Suppose there are two classes as a student general marks and

#include<iostream>
using namespace std;
class student_general_marks
{
protected:
    int roll;
    float marks1;
    float marks2;
    public:
    void General(){
    cout<<"Enter roll number"<<endl;
    cin>>roll;
    cout<<"Enter marks1"<<endl;
    cin>>marks1;
    cout<<"Enter marks2"<<endl;
    cin>>marks2;
        }
    };
                                    class CPP_marks{
                                    protected:
                                    float CPP_marks;
                                    public:
                                    void programming(){
                                    cout<<"Enter marks"<<endl;
                                    cin>>CPP_marks;
                                    }
                                    };
                                                                class result:public student_general_marks,public CPP_marks
                                                                {
                                                                protected:
                                                                float avg;
                                                                public:
                                                                void resultdisplay(){
                                                                avg=(marks1+marks2+CPP_marks)/3.00;
                                                                cout<<"Avg is :"<<avg;
                                                                }
                                                                };



    int main(){
        result R;
        R.General();
        R.programming();
        R.resultdisplay();
        return 0;
    }