#include <iostream>

int fact(int n) {
     cout << "In fact, n = " << n << endl;
     if (n == 0) {
        return(1);
     } else if (n == 1) {
        return(1);
     } else {
        return(n*fact(n-1));
     }

}

int main () {
    cout << fact(3) << endl << endl;
    cout << fact(5) << endl << endl;
    cout << fact(7) << endl << endl;
}