// 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;
    }
}