.

projects/11/Average/Main.jack

@@ -0,0 +1,29 @@
+// 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/Average/Main.jack
+
+// (Same as projects/09/Average/Main.jack)
+
+// Inputs some numbers and computes their average
+class Main {
+   function void main() {
+     var Array a; 
+     var int length;
+     var int i, sum;
+
+     let length = Keyboard.readInt("How many numbers? ");
+     let a = Array.new(length); // constructs the array
+     
+     let i = 0;
+     while (i < length) {
+        let a[i] = Keyboard.readInt("Enter a number: ");
+        let sum = sum + a[i];
+        let i = i + 1;
+     }
+     
+     do Output.printString("The average is ");
+     do Output.printInt(sum / length);
+     return;
+   }
+}

projects/11/Average/Main.vm

@@ -0,0 +1,149 @@
+function Main.main 4
+push constant 18
+call String.new 1
+push constant 72
+call String.appendChar 2
+push constant 111
+call String.appendChar 2
+push constant 119
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+push constant 109
+call String.appendChar 2
+push constant 97
+call String.appendChar 2
+push constant 110
+call String.appendChar 2
+push constant 121
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+push constant 110
+call String.appendChar 2
+push constant 117
+call String.appendChar 2
+push constant 109
+call String.appendChar 2
+push constant 98
+call String.appendChar 2
+push constant 101
+call String.appendChar 2
+push constant 114
+call String.appendChar 2
+push constant 115
+call String.appendChar 2
+push constant 63
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+call Keyboard.readInt 1
+pop local 1
+push local 1
+call Array.new 1
+pop local 0
+push constant 0
+pop local 2
+label L0
+push local 2
+push local 1
+lt
+not
+if-goto L1
+push local 0
+push local 2
+push constant 16
+call String.new 1
+push constant 69
+call String.appendChar 2
+push constant 110
+call String.appendChar 2
+push constant 116
+call String.appendChar 2
+push constant 101
+call String.appendChar 2
+push constant 114
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+push constant 97
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+push constant 110
+call String.appendChar 2
+push constant 117
+call String.appendChar 2
+push constant 109
+call String.appendChar 2
+push constant 98
+call String.appendChar 2
+push constant 101
+call String.appendChar 2
+push constant 114
+call String.appendChar 2
+push constant 58
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+call Keyboard.readInt 1
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push local 3
+push local 0
+push local 2
+add
+pop pointer 1
+push that 0
+add
+pop local 3
+push local 2
+push constant 1
+add
+pop local 2
+goto L0
+label L1
+push constant 15
+call String.new 1
+push constant 84
+call String.appendChar 2
+push constant 104
+call String.appendChar 2
+push constant 101
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+push constant 97
+call String.appendChar 2
+push constant 118
+call String.appendChar 2
+push constant 101
+call String.appendChar 2
+push constant 114
+call String.appendChar 2
+push constant 97
+call String.appendChar 2
+push constant 103
+call String.appendChar 2
+push constant 101
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+push constant 105
+call String.appendChar 2
+push constant 115
+call String.appendChar 2
+push constant 32
+call String.appendChar 2
+call Output.printString 1
+pop temp 0
+push local 3
+push local 1
+call Math.divide 2
+call Output.printInt 1
+pop temp 0
+push constant 0
+return