利用ellipse and rectangle 画图（在TC中实现）。
程序分析：无。
程序源代码：

include "stdio.h"

include "graphics.h"

include "conio.h"

main()
{
int driver=VGA,mode=VGAHI;
int i,num=15,top=50;
int left=20,right=50;
initgraph(&driver,&mode,"");
for(i=0;i<num;i++)
{
ellipse(250,250,0,360,right,left);
ellipse(250,250,0,360,20,top);
rectangle(20-2i,20-2i,10(i+2),10(i+2));
right+=5;
left+=5;
top+=10;
}
getch();
}