2. Define a STUDENT class with USN, Name, and Marks in 3 tests of a subject. Declare an array of 20 STUDENT objects. Using appropriate functions, find the average of the two better marks for each student. Print the USN, Name and the average marks of all the students.

#include <iostream.h>

#include <stdio.h>

#include <conio.h>

class STUDENT

{

 private: char USN[10], Name[10];

                float marks1, marks2, marks3; //marks for the three subjects                           average_marks; //Average marks for the best two

public: void Readdata();

             void Calculate_Average_Marks();

             void Displaydata();

};

void STUDENT::Readdata()

{

cout << "Enter the name and USN : " ;

cin >> Name >> USN;

cout << "Enter marks1, marks2, marks3 : " ;

cin >> marks1 >> marks2 >> marks3;

}

void STUDENT::Calculate_Average_Marks()

{

int smallest;

if( (marks1 < marks2) && (marks1 < marks3) ) average_marks = (marks2+ marks3)/2;

else if (marks2 < marks3) average_marks = (marks1 + marks3)/2;

else average_marks = (marks1 + marks2)/2;

}

void STUDENT::Displaydata()

{

cout << "USN:" << USN << "\t Name:" << Name << "\t Average Marks:";

 cout("%0.2f\n",average_marks);

}

void main()

{

STUDENT student[10];

clrscr();

for(int i=0;i<20;i++)

{

student[i].Read_Data();

}

for(i=0;i<20;i++)

{

student[i].Calculate_Average_Marks();student[i].Display_Data();

}

}