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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/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;
+ }
+}