projects/09/Average/Main.jack


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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;
   }
}