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<pre><span lang=EN-US><span style="mso-spacerun: yes"> </span>day month date hours:minutes:seconds year\n\0</span></pre>
<p style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US>ctime() 等同 </span></p>
<pre><span lang=EN-US><span style="mso-spacerun: yes"> </span>asctime( localtime( tp ) );</span></pre>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>相关主题</span><span lang=EN-US>:</span></i><span lang=EN-US><br>
<strong><a href="#localtime">localtime()</a>, <a href="#gmtime">gmtime()</a>, <a
href="#time">time()</a>, and <a href="#asctime">asctime()</a>. </strong></span></p>
<div class=MsoNormal align=center style='text-align:center;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<h2 style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US><a name="difftime">difftime</a> </span></h2>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语法</span><span lang=EN-US>:</span></i><span lang=EN-US> </span></p>
<table border=0 cellpadding=0 bgcolor="#ccccff" style='mso-cellspacing:1.5pt;
background:#CCCCFF;mso-padding-alt:0cm 0cm 0cm 0cm'>
<tr>
<td style='padding:.75pt .75pt .75pt .75pt'><pre><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>#include <time.h></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>double difftime( time_t time2, time_t time1 );</span></pre></td>
</tr>
</table>
<p style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'>功能：
函数返回时间参数<i><span lang=EN-US>time2</span></i>和<i><span lang=EN-US>time1</span></i>之差的秒数表示。</p>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>相关主题</span><span lang=EN-US>:</span></i><span lang=EN-US><br>
<strong><a href="#localtime">localtime()</a>, <a href="#gmtime">gmtime()</a>, <a
href="#time">time()</a>, and <a href="#asctime">asctime()</a>. </strong></span></p>
<div class=MsoNormal align=center style='text-align:center;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<h2 style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US><a name="gmtime">gmtime</a> </span></h2>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语法</span><span lang=EN-US>:</span></i><span lang=EN-US> </span></p>
<table border=0 cellpadding=0 bgcolor="#ccccff" style='mso-cellspacing:1.5pt;
background:#CCCCFF;mso-padding-alt:0cm 0cm 0cm 0cm'>
<tr>
<td style='padding:.75pt .75pt .75pt .75pt'><pre><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>#include <time.h></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>struct tm *gmtime( const time_t *time );</span></pre></td>
</tr>
</table>
<p style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'>功能：
函数返回给定的统一世界时间（通常是格林威治时间），如果系统不支持统一世界时间系统返回<span lang=EN-US>NULL。 <a
href="static_return.html">警告!</a> </span></p>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>相关主题</span><span lang=EN-US>:</span></i><span lang=EN-US><br>
<strong><a href="#localtime">localtime()</a>, <a href="#time">time()</a>, and <a
href="#asctime">asctime()</a>. </strong></span></p>
<div class=MsoNormal align=center style='text-align:center;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<h2 style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US><a name="localtime">localtime</a> </span></h2>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语法</span><span lang=EN-US>:</span></i><span lang=EN-US> </span></p>
<table border=0 cellpadding=0 bgcolor="#ccccff" style='mso-cellspacing:1.5pt;
background:#CCCCFF;mso-padding-alt:0cm 0cm 0cm 0cm'>
<tr>
<td style='padding:.75pt .75pt .75pt .75pt'><pre><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>#include <time.h></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>struct tm *localtime( const time_t *time );</span></pre></td>
</tr>
</table>
<p style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'>功能：
函数返回本地日历时间。<span lang=EN-US><a href="static_return.html">警告！</a> </span></p>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>相关主题</span><span lang=EN-US>:</span></i><span lang=EN-US><br>
<strong><a href="#gmtime">gmtime()</a>, <a href="#time">time()</a>, and <a
href="#asctime">asctime()</a>. </strong></span></p>
<div class=MsoNormal align=center style='text-align:center;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<h2 style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US><a name="mktime">mktime</a> </span></h2>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语法</span><span lang=EN-US>:</span></i><span lang=EN-US> </span></p>
<table border=0 cellpadding=0 bgcolor="#ccccff" style='mso-cellspacing:1.5pt;
background:#CCCCFF;mso-padding-alt:0cm 0cm 0cm 0cm'>
<tr>
<td style='padding:.75pt .75pt .75pt .75pt'><pre><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>#include <time.h></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>time_t mktime( struct tm *time );</span></pre></td>
</tr>
</table>
<p style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'>功能：
函数转换参数<i><span lang=EN-US>time</span></i><span lang=EN-US> 类型的本地时间至日历时间，并返回结果。如果发生错误，返回－1。
</span></p>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>相关主题</span><span lang=EN-US>:</span></i><span lang=EN-US><br>
<strong><a href="#time">time()</a>, <a href="#gmtime">gmtime()</a>, <a
href="#asctime">asctime()</a>, and <a href="#ctime">ctime()</a>. </strong></span></p>
<div class=MsoNormal align=center style='text-align:center;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<h2 style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
lang=EN-US><a name="strftime">strftime</a> </span></h2>
<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><i><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语法</span><span lang=EN-US>:</span></i><span lang=EN-US> </span></p>
<table border=0 cellpadding=0 bgcolor="#ccccff" style='mso-cellspacing:1.5pt;
background:#CCCCFF;mso-padding-alt:0cm 0cm 0cm 0cm'>
<tr>
<td style='padding:.75pt .75pt .75pt .75pt'><pre><span lang=EN-US><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>#include <time.h></span></pre><pre><span
lang=EN-US><span style="mso-spacerun: yes"> </span>size_t strftime( char *str, size_t maxsize, const char *fmt, struct tm *time );</span></pre></td>
</tr>
</table>
<p style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'>功能：
函数按照参数<i><span lang=EN-US>fmt</span></i>所设定格式将<i><span lang=EN-US>time</span></i>类型的参数格式化为日期时间信息，然后存储在字符串<i><span
lang=EN-US>str</span></i>中（至多<i><span lang=EN-US>maxsize</span></i><span
lang=EN-US> 个字符）。用于设定时间不同类型的代码为： </span></p>
<table border=0 cellpadding=0 bgcolor="#eeeeff" style='mso-cellspacing:1.5pt;
background:#EEEEFF;mso-padding-alt:0cm 0cm 0cm 0cm'>
<tr>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><strong><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>代码</span></strong><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><strong><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>含义</span></strong><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><span lang=EN-US>%a</span><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><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>星期的缩略形式</span><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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<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span lang=EN-US>%A</span><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><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-hansi-font-family:"Times New Roman"'>星期的完整形式</span><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><span lang=EN-US>%b</span><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><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-hansi-font-family:"Times New Roman"'>月份的缩略形式</span><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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<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span lang=EN-US>%B</span><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><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-hansi-font-family:"Times New Roman"'>月份的完整形式</span><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><span lang=EN-US>%c</span><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><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-hansi-font-family:"Times New Roman"'>月份的缩略形式</span><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><span lang=EN-US>%d</span><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><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>月中的第几天</span><span lang=EN-US>(1-31)</span><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><span lang=EN-US>%H</span><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><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>小时</span><span lang=EN-US>, 24</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>小时格式</span><span lang=EN-US> (0-23)</span><span
lang=EN-US style='font-size:12.0pt;font-family:宋体'><o:p></o:p></span></p>
</td>
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<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span lang=EN-US>%I</span><span lang=EN-US
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