Factorial.cpp

#include <iostream>

int factorial(int n) {

  int fact = 1;
  for (size_t i = 1; i <= n; i++) {
    fact = i * fact;
  }

  return fact;
}

int main() {

  int nums[] = {0, 1, 2, 3, 4, 5};

  for (auto i : nums) {
    std::cout << std::to_string(i) + "! = " << factorial(i) << std::endl;
  }

  return 0;
}