#include "stdlib.h"

#include "graphics.h"

#include "stdio.h"

#include "math.h"

#include "conio.h "

#define PI  3.1425926

main()

{

int gdriver=DETECT,gmode,errorcode;

int a[10],b[10],x,y,c,r,i,j,t;

double rad = 0.0;

/* initialize graphics and local variables */

initgraph(&gdriver , &gmode ,"");

/* read result of initialization */

errorcode = graphresult();

if (errorcode != grOk)  /* an error occurred */

{

printf("Graphics error : %s/n",grapherrormsg(errorcode));

printf("Please any key to halt:");

getch();

exit(1);  /* terminate with an error code */

}

randomize();

for(;!kbhit();)

{

x=rand()%500+100; /*随机中心坐标*/

y=rand()%300+100;

/*   */

for(r = 0 ;r