Question No. 1

#include <iostream>
#include <iomanip>

using namespace std;

int factorial(int);

int main() {
    int again = 1;
    do {

    int n, fact;

        cout << "Enter a positive number to find factorial : ";
        cin >> n;

    while (n <= 0) {
        cout << "\nError : You entered a negative number." << endl;
        cout << "\nPlease enter a positive number to find factorial : ";
        cin >> n;
    }
        fact = factorial(n);

        cout << "\nNumber" << setw(14) <<"Factorial" << endl;
        cout << n << setw(13) << fact << endl;

        cout << "\nDo you want to repeat the program? (1 = Yes, 0 = No)" << endl;
        cin >> again;

    }
    while (again == 1);
    return 0;
}

int factorial(int f) {
    int fact = 1;

    for (int i = 1; i<=f; i++) {
        fact*=i;
    }
    return fact;
}