#include <iostream>
#include <cctype>
#include <iomanip>
#include <cmath>
#include <fstream>
#include <string>
 
 
using namespace std;
 
int main(void) 
{
int num;//number to get it's factorial
 
cout << "Please enter a positive number: ";
cin >> num;//user enters number
if (num < 0)
{
cout << "That is not a positive number.\n";
}
else
{
cout << num << " factorial is: " << factorial(num) << endl;
}

int factorial(int ) 
{
int temp;
if(num <= 1) return 1;
//figure out the simple calculaltion
return temp;
}//end for factorial