uTools-Manuals/docs/c/ceil.html
2019-04-21 11:50:48 +08:00

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<h1>数学函数 - ceil</h1>
<p>原型extern float ceil(float x);</p>
<p>用法:#include &lt;math.h></p>
<p>功能求不小于x的最小整数</p>
<p>说明返回x的上限如74.12的上限为75-74.12的上限为-74。返回值为float类型。</p>
举例:<pre><code class="language-c">
// ceil.c
#include &lt;syslib.h>
#include &lt;math.h>
main()
{
float x;
clrscr(); // clear screen
textmode(0x00); // 6 lines per LCD screen
x=74.12;
printf("ceil(%.2f)=%.0f\n",x,ceil(x));
x=-74.12;
printf("ceil(%.2f)=%.0f\n",x,ceil(x));
getchar();
return 0;
}
</code></pre>相关函数:<a href="floor.html">floor</a>