Find number of Factorial Using class and object

Solution in c++:
///**********ALLAH IS ALMIGHTY************///
///AH Tonmoy
///Department of CSE,23rd batch
///Islamic University,Bangladesh
#include<bits/stdc++.h>
using namespace std;
class student
{
    public:
    int number,factorial=1;
    void getdata();
    void calculation();
    void putdata();
};
void student::getdata()
{
    cin>>number;
}
void student::calculation()
{
    for(int i=1; i<=number; i++)
    {
        factorial=factorial*i;
    }
}
void student::putdata()
{
    cout<<"Factorial of "<<number<<"! is "<<factorial<<endl;
}
int main()
{
    student x;
    x.getdata();
    x.calculation();
    x.putdata();
}