#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <graphics.h>
struct POINT { int x,y; };
void main() {
  int Drv,mode,lo,sh,i;
  struct POINT p1;
  float r1,r2,k;

  printf("give me the circulus point -->"); scanf("%d %d",&p1.x,&p1.y);
  printf("give me the long and short length -->"); scanf("%d %d",&lo,&sh);

  Drv=DETECT; initgraph(&Drv,&mode,"");
  setcolor(3); ellipse(p1.x,p1.y,0,360,lo,sh);  getche(); clearviewport();
  for (i=0; i<=90; i++) {
    k=i*3.14159/180.0; r1=lo*cos(k); r2=sh*sin(k);
    putpixel(p1.x+r1,p1.y+r2,5);    putpixel(p1.x-r1,p1.y+r2,6);
    putpixel(p1.x-r1,p1.y-r2,7);    putpixel(p1.x+r1,p1.y-r2,8);
  }
  getche(); closegraph();
}