OBJECT ORIENTED PROGRAMMING PROBLEM

#include<iostream>

using namespace std;

class student {

    private:

        char name[20];

        int roll,mark1,mark2,mark3, total , percentage;

    public:

        void getdata(){

            cout<<"Enter name of student :  ";

            cin>>name;

            cout<<endl;

            cout<<"Enter roll no  of student :  ";

            cin>>roll;

            cout<<endl;

            cout<<"Enter Marks of subject 1 of student :  ";

            cin>>mark1;

            cout<<endl;

            cout<<"Enter Marks of subject 2 of student :  ";

            cin>>mark2;

            cout<<endl;

             cout<<"Enter Marks of subject 3 of student :  ";

            cin>>mark3;

            cout<<endl;

        }

        void calculate();

        void display(){

             cout<<"The name of student is  "<<name;

            cout<<endl;

            cout<<"The roll of student is  "<<roll;

            cout<<endl;

            cout<<"The mark1 of student is  "<< mark1;

            cout<<endl;

            cout<<"The mark2 of student is  "<<mark2;

            cout<<endl;

            cout<<"The mark2 of student is  "<<mark2;

            cout<<endl;

            cout<<"The total marks of student is  "<<total;

            cout<<endl;

            cout<<"The percentage of student is  "<<percentage;

            cout<<endl;

        }

};

void student :: calculate(){

    total = mark1 + mark2 + mark3;

    percentage = total/3;

}

int main(){

    student Gaurav;

    Gaurav.getdata();

    Gaurav.calculate();

    Gaurav.display();

}

O