Define a structure of student class: 

Write a program to define a structure of student record in C.

class student

{

char name[20];

int roll_no;

int marks[2];

float average;

public:

 void input();

 void output();

 float calci();

 friend  void rank(student ,student );

 };

 void student:: input()

 {

 cout << "enter the name ,rollno,marks of 2 subjects\n";

 cin>> name >> roll_no >>marks[0]>>marks[1];

 }

 void student :: output()

 {

 cout<

 }

 float  student :: calci()

 {

return average= float(marks[0]+ marks[1]) / 2;

 }

 void rank(student a, student b)

     {

                if ( a.calci() > b.calci() )

                 cout << "the student e1 is best\n";

                 else

                 cout <<"the studentr e2 is best\n";

     }

 void main()

 {

 clrscr();

 student t[2];

 t[0].input();

// t[0].calci();

// t[0].output();

 t[1].input();

// t[0].calci();

 //t[1].output();

 rank(t[0],t[1]);

 getch();

 }