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

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