用C語言編程2小球在屏幕上隨機碰撞，能給代碼的最好

#include"stdlib.h"

void main()

{int driver,mode,i,size;

void *buf;

driver=DETECT;

initgraph(&driver,&mode,"");

setbkcolor(BLUE);

cleardevice();

setcolor(LIGHTRED);

setlinestyle(0,0,1);

setlinestyle(1,10);

circle(100,200,12);

floodfill(100,200,12);

size=imagesize(69,169,131,231);

buf=malloc(size);

getimage(69,169,131,231,buf);

putimage(500,169,buf,COPY_PUT);

do

{for(o=0;i<20;i++)

{putimage(70+i,170,buf,COPY_PUT);

putimage(500-i,170,buf,COPY_PUT);

}

for(i=0;i<200;i++)

{putimage(255-i,170,buf,COPY_PUT);

putimage(315+i,170,buf,COPY_PUT);

}

} while(getch()!='q'&&getch()!='Q');

closegraph();

}