factorial

//Sebastian Moore
//CS 52 Spring 2019

#include <iostream>
  using namespace std;



int
main ()
{

int num1;

unsigned int x;

unsigned long long factorial = 1;

bool positive = true;

while (positive == true)

    {

cout << "Enter an integer: ";

cin >> num1;

    for(int x = 1; x <= num1; ++x)
    {
        factorial *= x;
    }

    cout << num1 << "! = " << factorial;
    }

if (num1 > 0)

	{

positive = false;

}

      else

	{

cout << "Error: number must be positive." << endl;

}



return 0;

}