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42 lines
1.1 KiB
HTML
42 lines
1.1 KiB
HTML
<h1>标准库函数 - line</h1>
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<p>原型:extern void line(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:在屏幕上画直线</p>
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<p>说明:(left,top)和(right,bottom)指定直线的两个端点坐标。mode决定划线的模式。</p>
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<pre><code class="language-c"> 超出屏幕的线将被裁端。
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mode值的含义:
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mode=0:清除方式
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=1:正常方式
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=2:取反方式
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</code></pre>
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举例:<pre><code class="language-c">
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// line.c
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#include <system.h>
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main()
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{
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clrscr();
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move(10,10); // hide cursor
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block(20,10,100,40,1);
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line(1,1,111,47,1); // from top left to bottom right
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line(1,47,111,1,0); // from bottom left to top right
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line(112/2,1,112/2,47,2); // line vertically at the middle of the LCD
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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:无
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