recursion in data stucture factorial of a number

#include<iostream>
using namespace std;
int fact(int num)
{
         if(num==0)
         return 1;
         else return num*fact(num-1);
}
int main()
{
int n;
cout<<"Enter any number please"<<endl;
cin>>n;
cout<<"factorial is "<<fact(n)<<endl;
}