Factorial of number in C++

#include<iostream>

using namespace std;

class factorial{

    public:

    int fact_of_n(int n) {

        int f = 1;

        for(int i = 1; i <= n; i++){

            f *= i;

        }

        cout<<"factorial of: "<<n<<" is: "<<f<<endl;

    }

};

int main(){

    int n;

    cout<<"Find Factorial\n\n";

    cout<<"enter a number: ";

    cin>> n;

    factorial fact;

    fact.fact_of_n(n);

}