// Outputs a value raised to the power of 1, 2, and 3.
#include <iostream>
#include "power1.h"
#include "power2.h"
#include "power3.h"

int main() {
  double x=2.5;
  std::cout << power1(x) << " "
            << power2(x) << " "
            << power3(x) << std::endl;
}