Midpoint Circle drawing algorithm

/* The program will generate a circle using Midpoint Circle drawing algorithm and is also known as Bresenhams Circle drawing algorithm */

 In computer graphics, the midpoint circle algorithm is an algorithm used to determine the points needed for drawing a circle. The Bresenham's line algorithm is derived from mid-point circle algorithm, and is known as Bresenham's circle algorithm

#include<conio.h>
#include<stdio.h>
#include<graphics.h>
void main()
{
int gd=DETECT,gm;
int r,x,y,xc,yc;
float d;
clrscr();
initgraph(&gd,&gm,"..\\bgi");
printf("Enter Radius\n");
scanf("%d",&r);
printf("Enter Center of circle\n");

scanf("%d",&xc);
scanf("%d",&yc);
d=1.25-r;
x=0;
y=r;
do
{
if(d<0)
{

x=x+1;
d=d+2*x+1;
}
else
{

x=x+1;
y=y-1;
d=d+2*x-2*y+1;
}
putpixel(xc+x,yc+y,5);
putpixel(xc-y,yc-x,5);
putpixel(xc+y,yc-x,5);
putpixel(xc-y,yc+x,5);
putpixel(xc+y,yc+x,5);
putpixel(xc-x,yc-y,5);
putpixel(xc+x,yc-y,5);
putpixel(xc-x,yc+y,5);
}
while(x<y);
getch();
closegraph();
}