#include<stdio.h>

/* Works only if a >= 0 and b >= 0  */

int pow(int a, int b)

{

  //base case : anything raised to the power 0 is 1

  if (b == 0)

    return 1;

  int answer = a;

  int increment = a;

  int i, j;

  for(i = 1; i < b; i++)

  {

     for(j = 1; j < a; j++)

     {

        answer += increment;

     }

     increment = answer;

  }

  return answer;

}

 

/* driver program to test above function */

int main()

{

  printf("\n %d", pow(5, 3));

  getchar();

  return 0;

}