From a000308104aab27c2dde9a306f1bc654b2db4806 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <me@ypei.me>
Date: Wed, 29 Nov 2017 12:30:41 +0100
Subject: first commit

---
 projects/10/ExpressionLessSquare/Square.jack | 99 ++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 projects/10/ExpressionLessSquare/Square.jack

(limited to 'projects/10/ExpressionLessSquare/Square.jack')

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;
+   }
+}  
-- 
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