The Factorial Of Any Integer Factorial In C++ Program?

#include<iostream.h>void main(void){int n;long int fact(int);cout<<"enter the number whose factorial is to be found:";cin>>n;cout<<"the factorial of"<<n<<"is"<<fact(n)<<endl;}long fact(int num){if(num==0)return 1;elsereturn num*fact(num-1);}