// factorial.cpp - Script 5.4

#include <iostream>

//function prototypes
void promptAndWait(); 
unsigned long returnFactorial(unsigned short num);

int main() { //begin main
    unsigned short numberIn;
    
    std::cout << "Enter a small, positive integer: [##] "; 
    std::cin >> numberIn; //prompt user and assign input to numberIn
    
    //print the factorial of the number, by calling the function, returnFactorial
    std::cout << "The factorial of " << numberIn << " is " << returnFactorial(numberIn) << ".\n\n"; 
    
    promptAndWait();
    return 0;
} //END OF MAIN

//define the functions
void promptAndWait() {
    std::cin.ignore(100, '\n');
    std::cout << "Press Enter or Return to Continue.\n";
    std::cin.get();
} //END of promptAndWait

unsigned long returnFactorial(unsigned short num) {
    unsigned long sum = 1; 
    for (int i = 1; 1 <= num; ++i) { //multiply i * sum, then increment i until i is greater than num
    sum *= i;    
    }// END for Loop
         
    return sum;
} //END returnFactorial function

    for (int i = 1; 1 <= num; ++i) {

    for (int i = 1; i <= num; ++i) {

    for (int i = 1; 1 <= num; ++i) {
        sum *= i;    
        std::cout << "i = " << i << ", sum = " << sum << std::endl;
    }