Generating Squares and Cubes with Only Addition

#include <stdio.h>

/*
  Silly math trick:
  Generating square numbers with only addition.
  At each step, add n, then n+1.

  Example: from 4*4 to 5*5
  ssss n
  ssss n
  ssss n
  ssss n
  nnnn 1
*/

int main(void) {
  int n = 1;
  int square = 1;

  while (square <= 256) {
    printf("%d * %d = %d\n", n, n, square);
    square += n++;
    square += n;
  }
}

#!/usr/bin/dc
1 d sn ss [ls p ln + ln 1 + sn ln + d ss 256 !<m] d sm x

#include <stdio.h>

/*
  Generating square and cube numbers with only addition.

  For squares, at each step, add n, then n+1.

  For cubes, add a square onto three sides that share a
  corner, fill in the resulting gaps by adding three n's,
  and one more for the corner. 
*/

int main(void) {
  int n = 1;
  int square = 1;
  int cube = 1;

  while (cube < 2000) {
    printf("%d * %d = %d\n", n, n, square);
    printf("%d * %d * %d = %d\n\n", n, n, n, cube);
    cube += square+square+square + n+n+n + 1;
    square += n + n + 1;
    n++;
  }
}