Develop a mark sheet in C++ for university examination with following data: a) Students’ name b) Enrolment no c) roll no d) Theory marks in 5 subjects e) Practical marks in five subjects f) grade Overload << and >> operator .Grade should be calculated for each subject. Use Constructor overloading. Roll no should be auto generated

 

#include<iostream>

#include<ctime>

using namespace std;

class marksheet

{

        char student_name[20];

        long int enroll;

        int rollno;

        int s[4];

        int p[4],t[4];

    public:

        marksheet(){};

        marksheet(char sn , long int en ,int rn)

        {

            student_name[20] = sn;

            enroll=en;

            rollno=rn;

        }

        void theory();

        void practical();

        void sum();

        void grade();

        friend istream & operator >>(istream &,marksheet &);

        friend ostream & operator <<(ostream &,marksheet &);

};

istream & operator >>(istream& in , marksheet &m)

{

    cout<<"enter the student name "<<endl;

    in>>m.student_name;

    cout<<"Enter theory marks of 5 subjects out of 70 : "<<endl;

    for (int i = 0; i < 5; i++)

    {

        in>>m.s[i];

    }

    cout<<"Enter practical marks of 5 subjects out of 30 : "<<endl;

    for (int i = 0; i < 5; i++)

    {

        in>>m.p[i];

    }

    cout<<"Enter enrollment no. :"<<endl;

    in>>m.enroll;

    return (in);

}

void marksheet :: sum()

{

   for (int i = 0; i < 5; i++)

   {

       t[i]=s[i]+p[i];

       cout<<"totol marks    : "<<t[i]<<endl;

   }

}

void marksheet :: grade ()

{

    for (int i = 0; i < 5; i++)

    {

        if(t[i]>=80)

        // ch='A';

        cout<<"grade = A"<<endl;

        else if(t[i]>=60)

        // ch='B';

        cout<<"grade = B"<<endl;

        else if(t[i]>=40)

        // ch='C';

        cout<<"grade = C"<<endl;

        else if(t[i]>=33)

        // ch='D';

        cout<<"grade = D"<<endl;

        else if(t[i]<33)

        // ch='f';

        cout<<"grade : FAIL"<<endl;

    }

}

ostream & operator <<(ostream & out , marksheet &m)

{

    m.rollno=rand()%100;

    out<<"student name    : "<<m.student_name<<endl;

    out<<"roll no         : "<<m.rollno<<endl;

    out<<"Enroll no.      : "<<m.enroll<<endl;

    return(out);

}

int main()

{

    srand(time(NULL));

    marksheet ms;

    cin>>ms;

    cout<<"\n\n*****************STUDENT INFO******************\n"<<endl;

    cout<<ms;

    ms.sum();

    ms.grade();

}

output :

enter the student name Rahul Enter theory marks of 5 subjects out of 70 : 20 30 40 50 60 Enter practical marks of 5 subjects out of 30 : 25 26 27 28 29 Enter enrollment no. : 27 roll no : 17 Enroll no. : 27

totol marks : 45 totol marks : 56 totol marks : 67 totol marks : 78 totol marks : 89 grade = c grade = C grade = B grade = B grade = A