diff options
Diffstat (limited to 'projects/10/ExpressionLessSquare')
| -rw-r--r-- | projects/10/ExpressionLessSquare/Main.jack | 36 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/Main.xml | 205 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/MainT.xml | 109 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/Square.jack | 99 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/Square.xml | 967 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/SquareGame.jack | 60 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/SquareGame.xml | 544 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/SquareGameT.xml | 268 | ||||
| -rw-r--r-- | projects/10/ExpressionLessSquare/SquareT.xml | 449 |
9 files changed, 2737 insertions, 0 deletions
diff --git a/projects/10/ExpressionLessSquare/Main.jack b/projects/10/ExpressionLessSquare/Main.jack new file mode 100644 index 0000000..d2c5561 --- /dev/null +++ b/projects/10/ExpressionLessSquare/Main.jack @@ -0,0 +1,36 @@ +// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/10/ExpressionLessSquare/Main.jack
+
+/** Expressionless version of projects/10/Square/Main.jack. */
+
+class Main {
+ static boolean test; // Added for testing -- there is no static keyword
+ // in the Square files.
+
+ function void main() {
+ var SquareGame game;
+ let game = game;
+ do game.run();
+ do game.dispose();
+ return;
+ }
+
+ function void test() { // Added to test Jack syntax that is not use in
+ var int i, j; // the Square files.
+ var String s;
+ var Array a;
+ if (i) {
+ let s = i;
+ let s = j;
+ let a[i] = j;
+ }
+ else { // There is no else keyword in the Square files.
+ let i = i;
+ let j = j;
+ let i = i | j;
+ }
+ return;
+ }
+}
diff --git a/projects/10/ExpressionLessSquare/Main.xml b/projects/10/ExpressionLessSquare/Main.xml new file mode 100644 index 0000000..6beb694 --- /dev/null +++ b/projects/10/ExpressionLessSquare/Main.xml @@ -0,0 +1,205 @@ +<class>
+ <keyword> class </keyword>
+ <identifier> Main </identifier>
+ <symbol> { </symbol>
+ <classVarDec>
+ <keyword> static </keyword>
+ <keyword> boolean </keyword>
+ <identifier> test </identifier>
+ <symbol> ; </symbol>
+ </classVarDec>
+ <subroutineDec>
+ <keyword> function </keyword>
+ <keyword> void </keyword>
+ <identifier> main </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <varDec>
+ <keyword> var </keyword>
+ <identifier> SquareGame </identifier>
+ <identifier> game </identifier>
+ <symbol> ; </symbol>
+ </varDec>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> game </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> game </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> game </identifier>
+ <symbol> . </symbol>
+ <identifier> run </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> game </identifier>
+ <symbol> . </symbol>
+ <identifier> dispose </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> function </keyword>
+ <keyword> void </keyword>
+ <identifier> test </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <varDec>
+ <keyword> var </keyword>
+ <keyword> int </keyword>
+ <identifier> i </identifier>
+ <symbol> , </symbol>
+ <identifier> j </identifier>
+ <symbol> ; </symbol>
+ </varDec>
+ <varDec>
+ <keyword> var </keyword>
+ <identifier> String </identifier>
+ <identifier> s </identifier>
+ <symbol> ; </symbol>
+ </varDec>
+ <varDec>
+ <keyword> var </keyword>
+ <identifier> Array </identifier>
+ <identifier> a </identifier>
+ <symbol> ; </symbol>
+ </varDec>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> i </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> s </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> i </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> s </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> j </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> a </identifier>
+ <symbol> [ </symbol>
+ <expression>
+ <term>
+ <identifier> i </identifier>
+ </term>
+ </expression>
+ <symbol> ] </symbol>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> j </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ </statements>
+ <symbol> } </symbol>
+ <keyword> else </keyword>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> i </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> i </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> j </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> j </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> i </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> i </identifier>
+ </term>
+ <symbol> | </symbol>
+ <term>
+ <identifier> j </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <symbol> } </symbol>
+</class>
diff --git a/projects/10/ExpressionLessSquare/MainT.xml b/projects/10/ExpressionLessSquare/MainT.xml new file mode 100644 index 0000000..f074ba4 --- /dev/null +++ b/projects/10/ExpressionLessSquare/MainT.xml @@ -0,0 +1,109 @@ +<tokens>
+<keyword> class </keyword>
+<identifier> Main </identifier>
+<symbol> { </symbol>
+<keyword> static </keyword>
+<keyword> boolean </keyword>
+<identifier> test </identifier>
+<symbol> ; </symbol>
+<keyword> function </keyword>
+<keyword> void </keyword>
+<identifier> main </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> var </keyword>
+<identifier> SquareGame </identifier>
+<identifier> game </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> game </identifier>
+<symbol> = </symbol>
+<identifier> game </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> game </identifier>
+<symbol> . </symbol>
+<identifier> run </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> game </identifier>
+<symbol> . </symbol>
+<identifier> dispose </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> function </keyword>
+<keyword> void </keyword>
+<identifier> test </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> var </keyword>
+<keyword> int </keyword>
+<identifier> i </identifier>
+<symbol> , </symbol>
+<identifier> j </identifier>
+<symbol> ; </symbol>
+<keyword> var </keyword>
+<identifier> String </identifier>
+<identifier> s </identifier>
+<symbol> ; </symbol>
+<keyword> var </keyword>
+<identifier> Array </identifier>
+<identifier> a </identifier>
+<symbol> ; </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> i </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> s </identifier>
+<symbol> = </symbol>
+<identifier> i </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> s </identifier>
+<symbol> = </symbol>
+<identifier> j </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> a </identifier>
+<symbol> [ </symbol>
+<identifier> i </identifier>
+<symbol> ] </symbol>
+<symbol> = </symbol>
+<identifier> j </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> else </keyword>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> i </identifier>
+<symbol> = </symbol>
+<identifier> i </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> j </identifier>
+<symbol> = </symbol>
+<identifier> j </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> i </identifier>
+<symbol> = </symbol>
+<identifier> i </identifier>
+<symbol> | </symbol>
+<identifier> j </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<symbol> } </symbol>
+</tokens>
diff --git a/projects/10/ExpressionLessSquare/Square.jack b/projects/10/ExpressionLessSquare/Square.jack new file mode 100644 index 0000000..33a54ad --- /dev/null +++ b/projects/10/ExpressionLessSquare/Square.jack @@ -0,0 +1,99 @@ +// This file is part of www.nand2tetris.org +// and the book "The Elements of Computing Systems" +// by Nisan and Schocken, MIT Press. +/// File name: projects/10/ExpressionLessSquare/Square.jack + +/** Expressionless version of projects/10/Square/Square.jack. */ + +class Square { + + field int x, y; + field int size; + + constructor Square new(int Ax, int Ay, int Asize) { + let x = Ax; + let y = Ay; + let size = Asize; + do draw(); + return x; + } + + method void dispose() { + do Memory.deAlloc(this); + return; + } + + method void draw() { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + return; + } + + method void erase() { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + return; + } + + method void incSize() { + if (x) { + do erase(); + let size = size; + do draw(); + } + return; + } + + method void decSize() { + if (size) { + do erase(); + let size = size; + do draw(); + } + return; + } + + method void moveUp() { + if (y) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let y = y; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } + + method void moveDown() { + if (y) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let y = y; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } + + method void moveLeft() { + if (x) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let x = x; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } + + method void moveRight() { + if (x) { + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + let x = x; + do Screen.setColor(x); + do Screen.drawRectangle(x, y, x, y); + } + return; + } +} diff --git a/projects/10/ExpressionLessSquare/Square.xml b/projects/10/ExpressionLessSquare/Square.xml new file mode 100644 index 0000000..ed0e6ec --- /dev/null +++ b/projects/10/ExpressionLessSquare/Square.xml @@ -0,0 +1,967 @@ +<class>
+ <keyword> class </keyword>
+ <identifier> Square </identifier>
+ <symbol> { </symbol>
+ <classVarDec>
+ <keyword> field </keyword>
+ <keyword> int </keyword>
+ <identifier> x </identifier>
+ <symbol> , </symbol>
+ <identifier> y </identifier>
+ <symbol> ; </symbol>
+ </classVarDec>
+ <classVarDec>
+ <keyword> field </keyword>
+ <keyword> int </keyword>
+ <identifier> size </identifier>
+ <symbol> ; </symbol>
+ </classVarDec>
+ <subroutineDec>
+ <keyword> constructor </keyword>
+ <identifier> Square </identifier>
+ <identifier> new </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ <keyword> int </keyword>
+ <identifier> Ax </identifier>
+ <symbol> , </symbol>
+ <keyword> int </keyword>
+ <identifier> Ay </identifier>
+ <symbol> , </symbol>
+ <keyword> int </keyword>
+ <identifier> Asize </identifier>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> x </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> Ax </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> y </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> Ay </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> size </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> Asize </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> draw </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> dispose </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Memory </identifier>
+ <symbol> . </symbol>
+ <identifier> deAlloc </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <keyword> this </keyword>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> draw </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> erase </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> incSize </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> erase </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> size </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> size </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> draw </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> decSize </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> size </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> erase </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> size </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> size </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> draw </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> moveUp </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> y </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> moveDown </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> y </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> moveLeft </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> x </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> moveRight </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> x </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> setColor </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Screen </identifier>
+ <symbol> . </symbol>
+ <identifier> drawRectangle </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> x </identifier>
+ </term>
+ </expression>
+ <symbol> , </symbol>
+ <expression>
+ <term>
+ <identifier> y </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <symbol> } </symbol>
+</class>
diff --git a/projects/10/ExpressionLessSquare/SquareGame.jack b/projects/10/ExpressionLessSquare/SquareGame.jack new file mode 100644 index 0000000..2866f0d --- /dev/null +++ b/projects/10/ExpressionLessSquare/SquareGame.jack @@ -0,0 +1,60 @@ +// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/10/ExpressionLessSquare/SquareGame.jack
+
+/** Expressionless version of projects/10/Square/SquareGame.jack. */
+
+class SquareGame {
+ field Square square;
+ field int direction;
+
+ constructor SquareGame new() {
+ let square = square;
+ let direction = direction;
+ return square;
+ }
+
+ method void dispose() {
+ do square.dispose();
+ do Memory.deAlloc(square);
+ return;
+ }
+
+ method void moveSquare() {
+ if (direction) { do square.moveUp(); }
+ if (direction) { do square.moveDown(); }
+ if (direction) { do square.moveLeft(); }
+ if (direction) { do square.moveRight(); }
+ do Sys.wait(direction);
+ return;
+ }
+
+ method void run() {
+ var char key;
+ var boolean exit;
+
+ let exit = key;
+ while (exit) {
+ while (key) {
+ let key = key;
+ do moveSquare();
+ }
+
+ if (key) { let exit = exit; }
+ if (key) { do square.decSize(); }
+ if (key) { do square.incSize(); }
+ if (key) { let direction = exit; }
+ if (key) { let direction = key; }
+ if (key) { let direction = square; }
+ if (key) { let direction = direction; }
+
+ while (key) {
+ let key = key;
+ do moveSquare();
+ }
+ }
+ return;
+ }
+}
+
diff --git a/projects/10/ExpressionLessSquare/SquareGame.xml b/projects/10/ExpressionLessSquare/SquareGame.xml new file mode 100644 index 0000000..288c6cd --- /dev/null +++ b/projects/10/ExpressionLessSquare/SquareGame.xml @@ -0,0 +1,544 @@ +<class>
+ <keyword> class </keyword>
+ <identifier> SquareGame </identifier>
+ <symbol> { </symbol>
+ <classVarDec>
+ <keyword> field </keyword>
+ <identifier> Square </identifier>
+ <identifier> square </identifier>
+ <symbol> ; </symbol>
+ </classVarDec>
+ <classVarDec>
+ <keyword> field </keyword>
+ <keyword> int </keyword>
+ <identifier> direction </identifier>
+ <symbol> ; </symbol>
+ </classVarDec>
+ <subroutineDec>
+ <keyword> constructor </keyword>
+ <identifier> SquareGame </identifier>
+ <identifier> new </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> square </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> square </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> direction </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> direction </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <expression>
+ <term>
+ <identifier> square </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> dispose </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> square </identifier>
+ <symbol> . </symbol>
+ <identifier> dispose </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Memory </identifier>
+ <symbol> . </symbol>
+ <identifier> deAlloc </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> square </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> moveSquare </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <statements>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> direction </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> square </identifier>
+ <symbol> . </symbol>
+ <identifier> moveUp </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> direction </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> square </identifier>
+ <symbol> . </symbol>
+ <identifier> moveDown </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> direction </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> square </identifier>
+ <symbol> . </symbol>
+ <identifier> moveLeft </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> direction </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> square </identifier>
+ <symbol> . </symbol>
+ <identifier> moveRight </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> Sys </identifier>
+ <symbol> . </symbol>
+ <identifier> wait </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ <expression>
+ <term>
+ <identifier> direction </identifier>
+ </term>
+ </expression>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <subroutineDec>
+ <keyword> method </keyword>
+ <keyword> void </keyword>
+ <identifier> run </identifier>
+ <symbol> ( </symbol>
+ <parameterList>
+ </parameterList>
+ <symbol> ) </symbol>
+ <subroutineBody>
+ <symbol> { </symbol>
+ <varDec>
+ <keyword> var </keyword>
+ <keyword> char </keyword>
+ <identifier> key </identifier>
+ <symbol> ; </symbol>
+ </varDec>
+ <varDec>
+ <keyword> var </keyword>
+ <keyword> boolean </keyword>
+ <identifier> exit </identifier>
+ <symbol> ; </symbol>
+ </varDec>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> exit </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <whileStatement>
+ <keyword> while </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> exit </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <whileStatement>
+ <keyword> while </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> key </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> moveSquare </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </whileStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> exit </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> exit </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> square </identifier>
+ <symbol> . </symbol>
+ <identifier> decSize </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> square </identifier>
+ <symbol> . </symbol>
+ <identifier> incSize </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> direction </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> exit </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> direction </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> direction </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> square </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <ifStatement>
+ <keyword> if </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> direction </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> direction </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ </statements>
+ <symbol> } </symbol>
+ </ifStatement>
+ <whileStatement>
+ <keyword> while </keyword>
+ <symbol> ( </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ) </symbol>
+ <symbol> { </symbol>
+ <statements>
+ <letStatement>
+ <keyword> let </keyword>
+ <identifier> key </identifier>
+ <symbol> = </symbol>
+ <expression>
+ <term>
+ <identifier> key </identifier>
+ </term>
+ </expression>
+ <symbol> ; </symbol>
+ </letStatement>
+ <doStatement>
+ <keyword> do </keyword>
+ <identifier> moveSquare </identifier>
+ <symbol> ( </symbol>
+ <expressionList>
+ </expressionList>
+ <symbol> ) </symbol>
+ <symbol> ; </symbol>
+ </doStatement>
+ </statements>
+ <symbol> } </symbol>
+ </whileStatement>
+ </statements>
+ <symbol> } </symbol>
+ </whileStatement>
+ <returnStatement>
+ <keyword> return </keyword>
+ <symbol> ; </symbol>
+ </returnStatement>
+ </statements>
+ <symbol> } </symbol>
+ </subroutineBody>
+ </subroutineDec>
+ <symbol> } </symbol>
+</class>
diff --git a/projects/10/ExpressionLessSquare/SquareGameT.xml b/projects/10/ExpressionLessSquare/SquareGameT.xml new file mode 100644 index 0000000..278a8a9 --- /dev/null +++ b/projects/10/ExpressionLessSquare/SquareGameT.xml @@ -0,0 +1,268 @@ +<tokens>
+<keyword> class </keyword>
+<identifier> SquareGame </identifier>
+<symbol> { </symbol>
+<keyword> field </keyword>
+<identifier> Square </identifier>
+<identifier> square </identifier>
+<symbol> ; </symbol>
+<keyword> field </keyword>
+<keyword> int </keyword>
+<identifier> direction </identifier>
+<symbol> ; </symbol>
+<keyword> constructor </keyword>
+<identifier> SquareGame </identifier>
+<identifier> new </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> square </identifier>
+<symbol> = </symbol>
+<identifier> square </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> direction </identifier>
+<symbol> = </symbol>
+<identifier> direction </identifier>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<identifier> square </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> dispose </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> square </identifier>
+<symbol> . </symbol>
+<identifier> dispose </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Memory </identifier>
+<symbol> . </symbol>
+<identifier> deAlloc </identifier>
+<symbol> ( </symbol>
+<identifier> square </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> moveSquare </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> direction </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> square </identifier>
+<symbol> . </symbol>
+<identifier> moveUp </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> direction </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> square </identifier>
+<symbol> . </symbol>
+<identifier> moveDown </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> direction </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> square </identifier>
+<symbol> . </symbol>
+<identifier> moveLeft </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> direction </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> square </identifier>
+<symbol> . </symbol>
+<identifier> moveRight </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> do </keyword>
+<identifier> Sys </identifier>
+<symbol> . </symbol>
+<identifier> wait </identifier>
+<symbol> ( </symbol>
+<identifier> direction </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> run </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> var </keyword>
+<keyword> char </keyword>
+<identifier> key </identifier>
+<symbol> ; </symbol>
+<keyword> var </keyword>
+<keyword> boolean </keyword>
+<identifier> exit </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> exit </identifier>
+<symbol> = </symbol>
+<identifier> key </identifier>
+<symbol> ; </symbol>
+<keyword> while </keyword>
+<symbol> ( </symbol>
+<identifier> exit </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> while </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> key </identifier>
+<symbol> = </symbol>
+<identifier> key </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> moveSquare </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> exit </identifier>
+<symbol> = </symbol>
+<identifier> exit </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> square </identifier>
+<symbol> . </symbol>
+<identifier> decSize </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> square </identifier>
+<symbol> . </symbol>
+<identifier> incSize </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> direction </identifier>
+<symbol> = </symbol>
+<identifier> exit </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> direction </identifier>
+<symbol> = </symbol>
+<identifier> key </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> direction </identifier>
+<symbol> = </symbol>
+<identifier> square </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> direction </identifier>
+<symbol> = </symbol>
+<identifier> direction </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> while </keyword>
+<symbol> ( </symbol>
+<identifier> key </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> key </identifier>
+<symbol> = </symbol>
+<identifier> key </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> moveSquare </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<symbol> } </symbol>
+</tokens>
diff --git a/projects/10/ExpressionLessSquare/SquareT.xml b/projects/10/ExpressionLessSquare/SquareT.xml new file mode 100644 index 0000000..cd03a1e --- /dev/null +++ b/projects/10/ExpressionLessSquare/SquareT.xml @@ -0,0 +1,449 @@ +<tokens>
+<keyword> class </keyword>
+<identifier> Square </identifier>
+<symbol> { </symbol>
+<keyword> field </keyword>
+<keyword> int </keyword>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ; </symbol>
+<keyword> field </keyword>
+<keyword> int </keyword>
+<identifier> size </identifier>
+<symbol> ; </symbol>
+<keyword> constructor </keyword>
+<identifier> Square </identifier>
+<identifier> new </identifier>
+<symbol> ( </symbol>
+<keyword> int </keyword>
+<identifier> Ax </identifier>
+<symbol> , </symbol>
+<keyword> int </keyword>
+<identifier> Ay </identifier>
+<symbol> , </symbol>
+<keyword> int </keyword>
+<identifier> Asize </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> let </keyword>
+<identifier> x </identifier>
+<symbol> = </symbol>
+<identifier> Ax </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> y </identifier>
+<symbol> = </symbol>
+<identifier> Ay </identifier>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> size </identifier>
+<symbol> = </symbol>
+<identifier> Asize </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> draw </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<identifier> x </identifier>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> dispose </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> Memory </identifier>
+<symbol> . </symbol>
+<identifier> deAlloc </identifier>
+<symbol> ( </symbol>
+<keyword> this </keyword>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> draw </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> erase </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> incSize </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> erase </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> size </identifier>
+<symbol> = </symbol>
+<identifier> size </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> draw </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> decSize </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> size </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> erase </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> size </identifier>
+<symbol> = </symbol>
+<identifier> size </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> draw </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> moveUp </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> y </identifier>
+<symbol> = </symbol>
+<identifier> y </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> moveDown </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> y </identifier>
+<symbol> = </symbol>
+<identifier> y </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> moveLeft </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> x </identifier>
+<symbol> = </symbol>
+<identifier> x </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> method </keyword>
+<keyword> void </keyword>
+<identifier> moveRight </identifier>
+<symbol> ( </symbol>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> if </keyword>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> { </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> let </keyword>
+<identifier> x </identifier>
+<symbol> = </symbol>
+<identifier> x </identifier>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> setColor </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<keyword> do </keyword>
+<identifier> Screen </identifier>
+<symbol> . </symbol>
+<identifier> drawRectangle </identifier>
+<symbol> ( </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> , </symbol>
+<identifier> x </identifier>
+<symbol> , </symbol>
+<identifier> y </identifier>
+<symbol> ) </symbol>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<keyword> return </keyword>
+<symbol> ; </symbol>
+<symbol> } </symbol>
+<symbol> } </symbol>
+</tokens>
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