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              <h1 id="firstHeading" class="firstHeading mw-first-heading">stdio.h</h1>
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<ul><li><a href="Stdlib.h#数据类型" title="Stdlib.h">数据类型</a></li>
<li><a href="Ctype.h" title="Ctype.h">字符类型</a></li>
<li><a href="String.h" title="String.h">字符串</a></li>
<li><a href="Math.h" title="Math.h">数学</a></li>
<li><a class="mw-selflink selflink">文件输入/输出</a></li>
<li><a href="Time.h" title="Time.h">日期/时间</a></li>
<li><a href="Locale.h" title="Locale.h">本地化</a></li>
<li><a href="Stdlib.h#函数" title="Stdlib.h">内存分配</a></li>
<li><a href="Stdlib.h#函数" title="Stdlib.h">过程控制</a></li>
<li><a href="Signal.h" title="Signal.h">信号</a></li>
<li><a href="C%E6%9B%BF%E4%BB%A3%E6%A0%87%E8%AE%B0" title="C替代标记">替代标记</a></li></ul></td>
</tr><tr><th class="sidebar-heading">
杂项</th></tr><tr><td class="sidebar-content" style="text-align: left">
<ul><li><code>&lt;<a href="Assert.h" title="Assert.h">assert.h</a>&gt;</code></li>
<li><code>&lt;<a href="Errno.h" title="Errno.h">errno.h</a>&gt;</code></li>
<li><code>&lt;<a href="Setjmp.h" title="Setjmp.h">setjmp.h</a>&gt;</code></li>
<li><code>&lt;<a href="Stdarg.h" title="Stdarg.h">stdarg.h</a>&gt;</code></li></ul></td>
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<p><code>stdio.h</code>（英語：<span lang="en"><b>standard input/output header</b></span>，标准输入/输出头文件）是<a href="C%E8%AF%AD%E8%A8%80" title="C语言">C语言</a>为输入输出提供的<a href="C%E6%A0%87%E5%87%86%E5%BA%93" class="mw-redirect" title="C标准库">标准库</a><a href="%E5%A4%B4%E6%96%87%E4%BB%B6" title="头文件">头文件</a>，其前身是<a href="%E8%BF%88%E5%85%8B%C2%B7%E8%8E%B1%E6%96%AF%E5%85%8B" title="迈克·莱斯克">迈克·莱斯克</a>20世纪70年代编写的“可移植输入输出程序库”<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>。
</p><p>C语言中的所有输入和输出都由抽象的字节流来完成，对文件的访问也通过关联的输入或输出流进行。这一模式随UNIX操作系统而普及，在现代操作系统和编程语言中仍被广泛应用。
</p>

<div class="mw-heading mw-heading2"><h2 id="头文件内容"><span id=".E5.A4.B4.E6.96.87.E4.BB.B6.E5.86.85.E5.AE.B9"></span>头文件内容</h2></div>
<div class="mw-heading mw-heading3"><h3 id="类型"><span id=".E7.B1.BB.E5.9E.8B"></span>类型</h3></div>
<table class="wikitable">

<tbody><tr>
<th>标识符</th>
<th>说明
</th></tr>
<tr>
<td><code>size_t</code></td>
<td>用于表示大小的数据类型
</td></tr>
<tr>
<td><code>FILE</code></td>
<td>记录流的信息的数据结构
</td></tr>
<tr>
<td><code>fpos_t</code></td>
<td>用于在文件中定位的数据类型
</td></tr></tbody></table>
<div class="mw-heading mw-heading3"><h3 id="宏"><span id=".E5.AE.8F"></span>宏</h3></div>
<table class="wikitable">

<tbody><tr>
<th>标识符</th>
<th>说明
</th></tr>
<tr>
<td><code>NULL</code></td>
<td>空指针
</td></tr>
<tr>
<td><code>_IOFBF</code></td>
<td rowspan="3">用于控制缓冲方式的参数
</td></tr>
<tr>
<td><code>_IOLBF</code>
</td></tr>
<tr>
<td><code>_IONBF</code>
</td></tr>
<tr>
<td><code>BUFSIZ</code></td>
<td><code>setbuf</code>函数使用的缓冲区大小
</td></tr>
<tr>
<td><code>EOF</code></td>
<td>文件结尾标志
</td></tr>
<tr>
<td><code>FOPEN_MAX</code></td>
<td>实现保证能够同时打开的文件数量
</td></tr>
<tr>
<td><code>FILENAME_MAX</code></td>
<td>实现保证支持的最长文件名的字符数
</td></tr>
<tr>
<td><code>L_tmpnam</code></td>
<td>存放<code>tmpnam</code>函数生成的临时文件名的<code>char</code>数组的大小
</td></tr>
<tr>
<td><code>SEEK_CUR</code></td>
<td rowspan="3">用于控制文件定位方式的参数
</td></tr>
<tr>
<td><code>SEEK_END</code>
</td></tr>
<tr>
<td><code>SEEK_SET</code>
</td></tr>
<tr>
<td><code>TMP_MAX</code></td>
<td>实现保证能生成的临时文件名个数
</td></tr></tbody></table>
<div class="mw-heading mw-heading3"><h3 id="标准流"><span id=".E6.A0.87.E5.87.86.E6.B5.81"></span>标准流</h3></div>
<table class="wikitable">

<tbody><tr>
<th>标识符</th>
<th>说明
</th></tr>
<tr>
<td><code>stderr</code></td>
<td>标准错误流
</td></tr>
<tr>
<td><code>stdin</code></td>
<td>标准输入流
</td></tr>
<tr>
<td><code>stdout</code></td>
<td>标准输出流
</td></tr></tbody></table>
<div class="mw-heading mw-heading3"><h3 id="函数"><span id=".E5.87.BD.E6.95.B0"></span>函数</h3></div>
<table class="wikitable">

<tbody><tr>
<th>类型</th>
<th>函数原型
</th></tr>
<tr>
<td rowspan="10">文件操作</td>
<td><code>int remove(const char *filename);</code>
</td></tr>
<tr>
<td><code>int rename(const char *old, const char *new);</code>
</td></tr>
<tr>
<td><code>FILE *tmpfile(void);</code>
</td></tr>
<tr>
<td><code>char *tmpnam(char *s);</code>
</td></tr>
<tr>
<td><code>int fclose(FILE *stream);</code>
</td></tr>
<tr>
<td><code>int fflush(FILE *stream);</code>
</td></tr>
<tr>
<td><code>FILE *fopen(const char * restrict filename, const char * restrict mode);</code>
</td></tr>
<tr>
<td><code>FILE *freopen(const char * restrict filename, const char * restrict mode, FILE * restrict stream);</code>
</td></tr>
<tr>
<td><code>void setbuf(FILE * restrict stream, char * restrict buf);</code>
</td></tr>
<tr>
<td><code>int setvbuf(FILE * restrict stream, char * restrict buf, int mode, size_t size);</code>
</td></tr>
<tr>
<td rowspan="14">格式化输入输出</td>
<td><code>int fprintf(FILE * restrict stream, const char * restrict format, ...);</code>
</td></tr>
<tr>
<td><code>int fscanf(FILE * restrict stream, const char * restrict format, ...);</code>
</td></tr>
<tr>
<td><code>int printf(const char * restrict format, ...);</code>
</td></tr>
<tr>
<td><code>int scanf(const char * restrict format, ...);</code>
</td></tr>
<tr>
<td><code>int snprintf(char * restrict s, size_t n, const char * restrict format, ...);</code>
</td></tr>
<tr>
<td><code>int sprintf(char * restrict s, const char * restrict format, ...);</code>
</td></tr>
<tr>
<td><code>int sscanf(const char * restrict s, const char * restrict format, ...);</code>
</td></tr>
<tr>
<td><code>int vfprintf(FILE * restrict stream, const char * restrict format, va_list arg);</code>
</td></tr>
<tr>
<td><code>int vfscanf(FILE * restrict stream, const char * restrict format, va_list arg);</code>
</td></tr>
<tr>
<td><code>int vprintf(const char * restrict format, va_list arg);</code>
</td></tr>
<tr>
<td><code>int vscanf(const char * restrict format, va_list arg);</code>
</td></tr>
<tr>
<td><code>int vsnprintf(char * restrict s, size_t n, const char * restrict format, va_list arg);</code>
</td></tr>
<tr>
<td><code>int vsprintf(char * restrict s, const char * restrict format, va_list arg);</code>
</td></tr>
<tr>
<td><code>int vsscanf(const char * restrict s, const char * restrict format, va_list arg);</code>
</td></tr>
<tr>
<td rowspan="10">字符输入输出</td>
<td><code>int fgetc(FILE *stream);</code>
</td></tr>
<tr>
<td><code>char *fgets(char * restrict s, int n, FILE * restrict stream);</code>
</td></tr>
<tr>
<td><code>int fputc(int c, FILE *stream);</code>
</td></tr>
<tr>
<td><code>int fputs(const char * restrict s, FILE * restrict stream);</code>
</td></tr>
<tr>
<td><code>int getc(FILE *stream);</code>
</td></tr>
<tr>
<td><code>int getchar(void);</code>
</td></tr>
<tr>
<td><code>int putc(int c, FILE *stream);</code>
</td></tr>
<tr>
<td><code>int putchar(int c);</code>
</td></tr>
<tr>
<td><code>int puts(const char *s);</code>
</td></tr>
<tr>
<td><code>int ungetc(int c, FILE *stream);</code>
</td></tr>
<tr>
<td rowspan="2">直接输入输出</td>
<td><code>size_t fread(void * restrict ptr, size_t size, size_t nmemb, FILE * restrict stream);</code>
</td></tr>
<tr>
<td><code>size_t fwrite(const void * restrict ptr, size_t size, size_t nmemb, FILE * restrict stream);</code>
</td></tr>
<tr>
<td rowspan="5">文件内定位</td>
<td><code>int fgetpos(FILE * restrict stream, fpos_t * restrict pos);</code>
</td></tr>
<tr>
<td><code>int fseek(FILE *stream, long int offset, int whence);</code>
</td></tr>
<tr>
<td><code>int fsetpos(FILE *stream, const fpos_t *pos);</code>
</td></tr>
<tr>
<td><code>long int ftell(FILE *stream);</code>
</td></tr>
<tr>
<td><code>void rewind(FILE *stream);</code>
</td></tr>
<tr>
<td rowspan="4">错误处理</td>
<td><code>void clearerr(FILE *stream);</code>
</td></tr>
<tr>
<td><code>int feof(FILE *stream);</code>
</td></tr>
<tr>
<td><code>int ferror(FILE *stream);</code>
</td></tr>
<tr>
<td><code>void perror(const char *s);</code>
</td></tr></tbody></table>
<div class="mw-heading mw-heading2"><h2 id="相关库"><span id=".E7.9B.B8.E5.85.B3.E5.BA.93"></span>相关库</h2></div>
<p><a href="C%2B%2B" title="C++">C++</a>引入了<code><a href="Iostream" title="Iostream">iostream</a></code>进行输入输出，但仍保留了<code>stdio.h</code>的功能。
</p><p><a href="%E8%B4%9D%E5%B0%94%E5%AE%9E%E9%AA%8C%E5%AE%A4" title="贝尔实验室">贝尔实验室</a>开发了Sfio库，旨在弥补<code>stdio.h</code>在功能、速度和安全性上的不足。<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="参见"><span id=".E5.8F.82.E8.A7.81"></span>参见</h2></div>
<ul><li><a href="I/O" title="I/O">I/O</a></li>
<li><a href="Wchar.h" title="Wchar.h">wchar.h</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="参考文献"><span id=".E5.8F.82.E8.80.83.E6.96.87.E7.8C.AE"></span>参考文献</h2></div>
<div class="reflist" style="list-style-type: decimal;">
<ol class="references">
<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r92366446">
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</style><cite class="citation book">Kernighan, Brian; Pike, Rob. <a rel="nofollow" class="external text" href="https://archive.org/details/unixprogramminge0000kern">The UNIX Programming Environment</a>. Englewood Cliffs: <a href="Prentice_Hall" class="mw-redirect" title="Prentice Hall">Prentice Hall</a>. 1984: <a rel="nofollow" class="external text" href="https://archive.org/details/unixprogramminge0000kern/page/200">200</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3AStdio.h&amp;rft.au=Pike%2C+Rob&amp;rft.aufirst=Brian&amp;rft.aulast=Kernighan&amp;rft.btitle=The+UNIX+Programming+Environment&amp;rft.date=1984&amp;rft.genre=book&amp;rft.pages=200&amp;rft.place=Englewood+Cliffs&amp;rft.pub=Prentice+Hall&amp;rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Funixprogramminge0000kern&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;">&nbsp;</span></span></span>
</li>
<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite class="citation conference">Korn, David G.; Vo, Kiem-Phong. SFIO: Safe/Fast String/File IO. Proc. Summer USENIX Conf. 1991.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3AStdio.h&amp;rft.au=Vo%2C+Kiem-Phong&amp;rft.aufirst=David+G.&amp;rft.aulast=Korn&amp;rft.btitle=SFIO%3A+Safe%2FFast+String%2FFile+IO&amp;rft.date=1991&amp;rft.genre=conference&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;">&nbsp;</span></span></span>
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<ul><li><cite class="citation book">ISO/IEC JTC 1/SC 22. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180810010929/https://www.iso.org/standard/74528.html">ISO/IEC 9899:2018, Information technology — Programming languages — C</a>.  <span class="reference-accessdate"> [<span class="nowrap">2018-08-19</span>]</span>. （<a rel="nofollow" class="external text" href="https://www.iso.org/standard/74528.html">原始内容</a>存档于2018-08-10）.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3AStdio.h&amp;rft.au=ISO%2FIEC+JTC+1%2FSC+22&amp;rft.btitle=ISO%2FIEC+9899%3A2018%2C+Information+technology+%E2%80%94+Programming+languages+%E2%80%94+C&amp;rft.genre=book&amp;rft_id=https%3A%2F%2Fwww.iso.org%2Fstandard%2F74528.html&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;">&nbsp;</span></span></li></ul>
</div>
<div class="mw-heading mw-heading2"><h2 id="外部链接"><span id=".E5.A4.96.E9.83.A8.E9.93.BE.E6.8E.A5"></span>外部链接</h2></div>
<ul><li><a rel="nofollow" class="external text" href="http://zh.cppreference.com/w/c/io">C语言输入/输出参考手册</a>（<a rel="nofollow" class="external text" href="https://web.archive.org/web/20180219090533/http://zh.cppreference.com/w/c/io">页面存档备份</a>，存于<a href="%E4%BA%92%E8%81%94%E7%BD%91%E6%A1%A3%E6%A1%88%E9%A6%86" title="互联网档案馆">互联网档案馆</a>）</li></ul></div><!--htdig_noindex--><div><div class="zim-footer">
    This article is issued from <a class="external text" title="Last edited on 2025-07-05" href="https://zh.wikipedia.org/wiki/?title=Stdio.h&amp;oldid=88099220">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.zh">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.
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