MidCir

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
int x,y,r,p;
void plot(int xc,int yc,int x,int y)
{
putpixel(xc+x,yc+y,WHITE);
putpixel(xc-x,yc+y,BLUE);
putpixel(xc+x,yc-y,WHITE);
putpixel(xc-x,yc-y,BROWN);
putpixel(xc+y,yc+x,WHITE);
putpixel(xc-y,yc+x,GREEN);
putpixel(xc+y,yc-x,WHITE);
putpixel(xc-y,yc-x,WHITE);
}
void midpoint(int xc,int yc,int r)
{
x=0;
y=r;
plot(xc,yc,x,y);
p=1-r;
while(x<y)
{
x++;
if(p<0)
p=p+2*(x+1);
else
{
y--;
p=p+2*(x-y)+1;
}
plot(xc,yc,x,y);
}
}


void main()
{
int xc,yc,r,gd,gm;
gd=DETECT;
clrscr();
initgraph(&gd,&gm,"C:\\TC\\BGI");
midpoint(300,250,142);
midpoint(157,250,200);
getch();
}