C++ Program to Calculate Area of Rectangle using Objects and Classes.

Calculate Area of Rectangle: Area = Length * width

Program Output:

Source Code 

#include<iostream>

#include<conio.h>

using namespace std;

class rectangle {

private:

int a, b;

public:

void setdata(int x, int y) 

{

a = x;

b = y;

}

void area()

{

int area = a*b;

cout<<"\n Area of Rectangle = " <<area;

}

};

int main()

{

rectangle r1, r2; //objects

r1.setdata(15,40);  //object r1 called setdate()

cout<<"\nFor First Rectangle ";

r1.area(); // object r1 calls area()

r2.setdata(30,60);  //object r1 called setdate()

cout<<"\nFor First Rectangle ";

r2.area(); // object r1 calls area()

getch();

return 0;

}