circle.cpp

#include <conio.h> 
#include <dos.h> 
#include <graphics.h> 
#include <stdio.h> 

// Driver code 
int main() 
{ 
int x,y,x_mid , y_mid , radius,dp;
int g_mode ,g_driver= DETECT;
//clrscr();
initgraph(&g_driver,&g_mode," ");
printf("************ MID POINT CIRCLE DRAWING ALOGORITHM ******\n\n");
printf("\n enter the coordinates=");
scanf("%d %d",&x_mid,&y_mid);
printf("\n now enter the radius =");
scanf("%d",&radius);
x=0;
y= radius;
dp=1-radius;
do
{
	putpixel (x_mid+x,y_mid+y, YELLOW);
	putpixel (x_mid+y,y_mid+x, YELLOW);
	putpixel (x_mid-y,y_mid+x, YELLOW);
	putpixel (x_mid-x,y_mid+y, YELLOW);
	putpixel (x_mid-x,y_mid-y, YELLOW);
	putpixel (x_mid-y,y_mid-x, YELLOW);
	putpixel (x_mid+y,y_mid-x, YELLOW);
	putpixel (x_mid+x,y_mid-y, YELLOW);
	if(dp<0){
		dp+=(2*x)+1;
		
	}
	else {
		y=y-1;
		dp+=(2*x)-(2*y)+1;
		
	}
	x=x+1;
	
}while (y>x);
getch();
return 0;
}