Thread: Calculating faculties

Code:

#include <iostream>

using std::cout;

int factorial(int input);

int main()
{
	cout << factorial(3) << "\n";
	return 0;
}

int factorial(int input)
{
	for (int output=1; input > 0; input--)
		output = output * input;
	return output;
}

Recursive function

Code:

#include <iostream>
#include <stdlib.h>
using namespace std;

int factorial(int fac)
{
  if(fac == 1)
  {
    return fac;
   }
  else
  {
     return fac * factorial(fac - 1);
  }
}

int main()
{
  int fac;
  cout << "INPUT: ";
  cin >> fac;
  cout << "FACTORIAL OF " << fac << " IS " << factorial(fac) << endl;
 system("PAUSE");
 return 0;
}