Projects, 01-06 completed

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+// 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/11/ComplexArrays/Main.jack

+

+/**

+ * Performs several complex array processing tests.

+ * For each test, the expected result is printed, along with the

+ * actual result. In each test, the two results should be equal.

+ */

+class Main {

+

+    function void main() {

+        var Array a, b, c;

+        

+        let a = Array.new(10);

+        let b = Array.new(5);

+        let c = Array.new(1);

+        

+        let a[3] = 2;

+        let a[4] = 8;

+        let a[5] = 4;

+        let b[a[3]] = a[3] + 3;  // b[2] = 5

+        let a[b[a[3]]] = a[a[5]] * b[((7 - a[3]) - Main.double(2)) + 1];  // a[5] = 8 * 5 = 40

+        let c[0] = null;

+        let c = c[0];

+        

+        do Output.printString("Test 1: expected result: 5; actual result: ");

+        do Output.printInt(b[2]);

+        do Output.println();

+        do Output.printString("Test 2: expected result: 40; actual result: ");

+        do Output.printInt(a[5]);

+        do Output.println();

+        do Output.printString("Test 3: expected result: 0; actual result: ");

+        do Output.printInt(c);

+        do Output.println();

+        

+        let c = null;

+

+        if (c = null) {

+            do Main.fill(a, 10);

+            let c = a[3];

+            let c[1] = 33;

+            let c = a[7];

+            let c[1] = 77;

+            let b = a[3];

+            let b[1] = b[1] + c[1];  // b[1] = 33 + 77 = 110;

+        }

+

+        do Output.printString("Test 4: expected result: 77; actual result: ");

+        do Output.printInt(c[1]);

+        do Output.println();

+        do Output.printString("Test 5: expected result: 110; actual result: ");

+        do Output.printInt(b[1]);

+        do Output.println();

+        return;

+    }

+    

+    function int double(int a) {

+    	return a * 2;

+    }

+    

+    function void fill(Array a, int size) {

+        while (size > 0) {

+            let size = size - 1;

+            let a[size] = Array.new(3);

+        }

+        return;

+    }

+}