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<body lang=ZH-CN link=blue vlink=blue style='tab-interval:21.0pt;text-justify-trim:
punctuation'>

<div class=Section1 style='layout-grid:15.6pt'>

<table border=0 cellpadding=0 width="100%" bgcolor="#eeeeff" style='width:100.0%;
 mso-cellspacing:1.5pt;background:#EEEEFF'>
 <tr>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="index.html">cppreference.com</a>
  -&gt; </span>
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>标准</span><span lang=EN-US>c</span><span
  style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>数学函数</span> </font> <span lang=EN-US style='font-size:12.0pt;
  font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
</table>

<h3><span lang=EN-US>Standard C Math<o:p></o:p></span></h3>

<table border=0 cellpadding=0 style='mso-cellspacing:1.5pt'>
 <tr>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#abs">abs()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求绝对值</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#acos">acos()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求反余弦</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#asin">asin()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求反正弦</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#atan">atan()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求反正切</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#atan2">atan2()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求反正切，按符号判定象限</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#ceil">ceil()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求不小于某值的最小整数</span> 
	<span
  style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>（求上界）</span></font><span lang=EN-US style='font-size:12.0pt;
  font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#cos">cos()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求余弦</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#cosh">cosh()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求双曲余弦</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#div">div()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='background:#EEEEFF;padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求商和余数</span></font><span lang=EN-US
  style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体"><span lang=EN-US><a href="stdmath_details.html#exp">exp()</a></span></font><span
  lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
  </td>
  <td style='padding:.75pt .75pt .75pt .75pt'>
  <p class=MsoNormal><font face="宋体">
	<span style='mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>求</span><span lang=EN-US>e</span><span
  style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>的幂</span></font><span lang=EN-US style='font-size:12.0pt;
  font-family:宋体'><o:p></o:p></span></p>
  </td>
 </tr>
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