C 语言经典100例题目：学用rectangle画方形。（在TC中实现）。
程序分析：无。
程序源代码：
// Created by www.zhishitu.com on 15/11/9.// Copyright © 2015年 . All rights reserved.//#include "graphics.h"int main(){ int x0,y0,y1,x1,driver,mode,i; driver=VGA;mode=VGAHI; initgraph(&driver,&mode,""); setbkcolor(YELLOW); x0=263;y0=263;y1=275;x1=275; for(i=0;i<=18;i++) { setcolor(1); rectangle(x0,y0,x1,y1); x0=x0-5; y0=y0-5; x1=x1+5; y1=y1+5; } settextstyle(DEFAULT_FONT,HORIZ_DIR,2); outtextxy(150,40,"How beautiful it is!"); line(130,60,480,60); setcolor(2); circle(269,269,137);}