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