How to find factorial of N using getters and setters?

CODE

How to find factorial of N using getters and setters?

//Write a program to find factorial of N using getters and setters…

#include<iostream>

using namespace std;

class fact

{

    int n,i,f=1;

public:

    void setValue(int n1)

    {

        n=n1;

    }

    void pro()

    {

        for(i=1;i<=n;i++)

        {

            f=f*i;

        }

    }

    int getValue()

    {

        return f;

    }

};

int main()

{

    fact obj;

    int n1,f;

    cout<<"enter N:";

    cin>>n1;

    obj.setValue(n1);

    obj.pro();

    f=obj.getValue();

    cout<<"\n factorial:"<<f;

}

Output:

enter N:7

 factorial:5040