This was a program we had to implement at the university a couple of months ago... It's just a tiny piece of code showing how to perform the sum of the squared numbers in [0, N]. That means, 1^2 + 2^2 + ... + N^2.

It's written in c and, well.. you'll find it pretty straight forward.

/* This program calculates the sum of the squared numbers in
  * the interval [0,N] without doing any multiplication.
  * 
  * You may use/change the code any way you want.
  * This program was made with academic purposes.
  * 
 */
 
 #include <stdio.h>
 
 int main (argsc, argsv)
 int argsc;
 char* argsv[];
 {
     int N = 0;
     for(N=1; N<11; N++)
     {
         int x = 0, c = 0, d = 1, e = 3;
         while (x<N)
         {
             x = x + 1;
             c = c + d;
             d = d + e;
             e = e + 2;            
         }
         printf("The sum of the squares is: %i\n",c);
     }
     return 0;
 }