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C graphics program to draw circles.

In this example we will learn how to draw circles on output screen in c programming language by using c graphics library functions?

In this example we will learn how to draw circles on output screen in c programming language by using c graphics library functions.

In this program we are using following library functions of graphics.h header file.

1. circle()
2. getmaxx()
3. getmaxy()

circle() - This library function is declared in graphics.h and used to draw a circle; it takes centre point coordinates and radius.

circle(int x,int y, int radius);

getmaxx() - This function returns maximum value of x coordinate.

int getmaxx();

getmaxy() - This function returns maximum value of y coordinate.

int getmaxy();

C Code Snippet - Graphics program to draw Circles

Let’s consider the following example:

/*C graphics program to draw circles.*/

#include <graphics.h>
#include <conio.h>
 
main()
{
	int gd = DETECT, gm;

	//init graphics
	initgraph(&gd, &gm, "C:/TURBOC3/BGI");
	/*
	if you are using turboc2 use below line to init graphics:
	initgraph(&gd, &gm, "C:/TC/BGI");
	*/

	//first circle from point(100,100)
	circle(100,100,50);

	//second circle from point(200,200)
	circle(200,200,50);

	//third circle from point(center,center)
	circle(getmaxx()/2,getmaxy()/2,50);

	getch();
	closegraph(); 
	return 0;
}

Output

Explanation of functions

circle(100,100,50) – will draw a circle of 50 from point(100,100).

circle(200,200,50) – will draw a circle of 50 from point(200,200).

circle(getmaxx()/2,getmaxy()/2,50) – will draw a circle of 50 from centre of the screen.