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<h1>数学函数 - fabs</h1>
<p>原型：extern float fabs(float x);</p>
<p>用法：#include &lt;math.h></p>
<p>功能：求浮点数x的绝对值</p>
<p>说明：计算|x|, 当x不为负时返回x，否则返回-x</p>
举例：<pre><code class="language-c">
// fabs.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("|%f|=%f\n",x,fabs(x));
x=0;
printf("|%f|=%f\n",x,fabs(x));
x=74.12;
printf("|%f|=%f\n",x,fabs(x));
getchar();
return 0;
}
</code></pre>相关函数：<a href="abs.html">abs</a>
<h1>数学函数 - fabs</h1>
<p>原型：extern float fabs(float x);</p>
<p>用法：#include &lt;math.h></p>
<p>功能：求浮点数x的绝对值</p>
<p>说明：计算|x|, 当x不为负时返回x，否则返回-x</p>
举例：<pre><code class="language-c">
// fabs.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("|%f|=%f\n",x,fabs(x));
x=0;
printf("|%f|=%f\n",x,fabs(x));
x=74.12;
printf("|%f|=%f\n",x,fabs(x));
getchar();
return 0;
}
</code></pre>相关函数：<a href="abs.html">abs</a>