C++ Program to show relationship of class and object

Program - 

 

#include<iostream.h>

#include<conio.h>

class sum

{

private:  

int rollno;

public:

void readdata(int rn)

{

rollno=rn;

}

void display()

{

cout<<rollno;

}

};

void main()

{

clrscr();

class sum d1,d2;

d1.readdata(121);

d2.readdata(1325);

cout<<"\n rollno of bca-1 is: ";

d1.display();

cout<<"\n rollno of bca-2 is:";

d2.display();

getch();

}

  

Output :

 rollno of bca-1 is: 121

 rollno of bca-2 is:1325