?? abs.html
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請(qǐng)選定要查看的函數(shù)
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<li><a href="abs.html">abs</a></li>
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<li><a href="acos.html">acos</a></li>
<li><a href="asin.html">asin</a></li>
<li><a href="atan.html">atan</a></li>
<li><a href="atan2.html">atan2</a></li>
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<li><a href="fabs.html">fabs</a></li>
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<li><a href="fmod.html">fmod</a></li>
<li><a href="frexp.html">frexp</a></li>
<li><a href="hypot.html">hypot</a></li>
<li><a href="ldexp.html">ldexp</a></li>
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<td>目前共有25個(gè)函數(shù)</td>
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<pre>
原型：extern int abs(int x);
用法：#include <math.h>
功能：求整數(shù)x的絕對(duì)值
說(shuō)明：計(jì)算|x|, 當(dāng)x不為負(fù)時(shí)返回x，否則返回-x
舉例：
// abs.c
#include <syslib.h>
#include <math.h>
main()
{
int x;
clrscr(); // clear screen
x=-5;
printf("|%d|=%d\n",x,abs(x));
x=0;
printf("|%d|=%d\n",x,abs(x));
x=+5;
printf("|%d|=%d\n",x,abs(x));
getchar();
return 0;
}
相關(guān)函數(shù)：<a href="fabs.html">fabs</a>
</pre>
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