Implement a class Rectangle that works just like the other graphics classes such as Circle or Line. A rectangle is constructed from two corner points. The sides of the rectangle are parallel to the coordinate axes: You do not yet know how to define a << operator to plot a rectangle. Instead, define a member function plot. Supply a function move. Pay attention to const. Then write a sample program that constructs and plots a few rectangles.

Two corner points to draw a rectangle are left top and right bottom corner coordinates.
Left and top specifies the X-coordinate and Y-coordinate of top left corner respectively.
Right and bottom specifies the X-coordinate and Y-coordinate of right bottom corner respectively.
Library graphics.h is declared to use different graphical operations.
Member function rectangle() is called 4 times to represent 4 rectangles.

Step 2:

// Program to draw a rectangle using graphics header

#include<graphics.h>

#include<conio.h>

#include<iostream>

int main ()

{

//To clear the screen

clrscr ();

//gm is used so that program can enter into graphic mode.

int gm;

//DETECT is used to tell the compiler that which graphics drivers need to be used

int grap = DETECT;

//Location of 4 rectangles

int left = 150, top = 250, right = 450, bottom = 350;

int l1 = 150, t1 = 150, r1 = 450, b1 = 450;

int l2 = 250, t2 = 350, r2 = 450, b2 = 150;

int l3 = 250, t3 = 150, r3 = 350, b3 = 450;

//initgraph function is used to reset the settings of graphics to their default settings.

initgraph (&grap, &gm, "");

// rectangle function is called

rectangle (left, top, right, bottom);

rectangle (l1, t1, r1, b1);

rectangle (l2, t2, r2, b2);

rectangle (l3, t3, r3, b3);

getch ();

//closegraph function is used to close all the settings that was revoked by gm and initgraph().

closegraph ();

return 0;

}