#include <iostream>
using namespace std;

int powerOf(int base, int e=2) {
  if(e==0)
    return 1;
  int result = base;
  for(int i=1; i<e; i++) {
    result *= base;
  }
  return result;
}

int main() {
  int a = 2, b;
  b = powerOf(a);
  cout << "a: " << a <<", b: " << b << endl;
  b = powerOf(a, 3);
  cout << "a: " << a <<", b: " << b << endl;
  b = powerOf(a, 5);
  cout << "a: " << a <<", b: " << b << endl;
}