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<h1>标准库函数 - rectangle</h1>
<p>原型extern void rectangle(int left, int top, int right, int bottom, int mode);</p>
<p>用法:#include &lt;system.h></p>
<p>功能:在屏幕上画一矩形。</p>
<p>说明left,top指定左上角坐标right,bottom指定右下角坐标。</p>
<pre>
mode决定画图方式其值含义如下
0清除方式
1正常方式
2反相方式
</pre>
举例:<pre>
// rectangle.c
#include &lt;system.h>
main()
{
int c;
clrscr();
gotoxy(10,10); // Hide cursor(moved out of screen)
rectangle(1,0,111,47,1);
getchar();
block(10,5,100,40,1);
rectangle(20,10,90,30,0); // invisible for clear mode if screen if blank
getchar();
rectangle(40,2,80,42,2);
getchar();
getchar();
return 0;
}
</pre>相关函数:<a href="block.html">block</a>