Input
Output
#include <iostream> using namespace std; int fact(int a){ if (a==0 || a==1){ return 1; } else{ return a*fact(a-1); } } int main(){ int n = 5; unsigned long factorial = 1; cout << "Enter the factorial number :"<< n <<endl; factorial= fact(n); cout << "Sum of two numbers value is :" << factorial << endl; return 0; }