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从www.CppReference.com打包的C++参考手册

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  <div class="name-format">
    fputc
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int fputc( int ch, FILE *stream );
</pre>

  <p>The function fputc() writes the given character <em>ch</em> to the
  given output <em>stream</em>. The return value is the character,
  unless there is an error, in which case the return value is
  <strong>EOF</strong>.</p>

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    <a href="getc.html">getc</a><br>
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  <div class="name-format">
    fputs
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int fputs( const char *str, FILE *stream );
</pre>

  <p>The fputs() function writes an array of characters pointed to by
  <em>str</em> to the given output <em>stream</em>. The return value is
  non-negative on success, and <strong>EOF</strong> on failure.</p>

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    <a href="fgets.html">fgets</a><br>
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    <a href="puts.html">puts</a>
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  <div class="name-format">
    fread
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int fread( void *buffer, size_t size, size_t num, FILE *stream );
</pre>

  <p>The function fread() reads <em>num</em> number of objects (where
  each object is <em>size</em> bytes) and places them into the array
  pointed to by buffer. The data comes from the given input
  <em>stream</em>. The return value of the function is the number of
  things read. You can use <a href="feof.html">feof</a>() or <a href=
  "ferror.html">ferror</a>() to figure out if an error occurs.</p>

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    <a href="fscanf.html">fscanf</a><br>
    <a href="fwrite.html">fwrite</a><br>
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  <div class="name-format">
    freopen
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  FILE *freopen( const char *fname, const char *mode, FILE *stream );
</pre>

  <p>The freopen() function is used to reassign an existing
  <em>stream</em> to a different file and mode. After a call to this
  function, the given file <em>stream</em> will refer to <em>fname</em>
  with access given by <em>mode</em>. The return value of freopen() is
  the new stream, or <strong>NULL</strong> if there is an error.</p>

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    <a href="fclose.html">fclose</a><br>
    <a href="fopen.html">fopen</a>
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  <div class="name-format">
    fscanf
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int fscanf( FILE *stream, const char *format, ... );
</pre>

  <p>The function fscanf() reads data from the given file
  <em>stream</em> in a manner exactly like scanf(). The return value of
  fscanf() is the number of variables that are actually assigned
  values, or <strong>EOF</strong> if no assignments could be made.</p>

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    <a href="fgets.html">fgets</a><br>
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    <a href="fread.html">fread</a><br>
    <a href="fwrite.html">fwrite</a><br>
    <a href="scanf.html">scanf</a><br>
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  <div class="name-format">
    fseek
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int fseek( FILE *stream, long offset, int origin );
</pre>

  <p>The function fseek() sets the file position data for the given
  <em>stream</em>. The origin value should have one of the following
  values (defined in stdio.h):</p>

  <table class="code-table">
    <tr>
      <th class="code-table-th">Name</th>

      <th class="code-table-th">Explanation</th>
    </tr>

    <tr>
      <td class="code-table-td">SEEK_SET</td>

      <td class="code-table-td">Seek from the start of the file</td>
    </tr>

    <tr>
      <td class="code-table-td">SEEK_CUR</td>

      <td class="code-table-td">Seek from the current location</td>
    </tr>

    <tr>
      <td class="code-table-td">SEEK_END</td>

      <td class="code-table-td">Seek from the end of the file</td>
    </tr>
  </table>

  <p>fseek() returns zero upon success, non-zero on failure. You can
  use fseek() to move beyond a file, but not before the beginning.
  Using fseek() clears the <strong>EOF</strong> flag associated with
  that stream.</p>

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  <div class="name-format">
    fsetpos
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int fsetpos( FILE *stream, const fpos_t *position );
</pre>

  <p>The fsetpos() function moves the file position indicator for the
  given <em>stream</em> to a location specified by the
  <em>position</em> object. fpos_t is defined in stdio.h. The return
  value for fsetpos() is zero upon success, non-zero on failure.</p>

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  <div class="name-format">
    ftell
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  long ftell( FILE *stream );
</pre>

  <p>The ftell() function returns the current file position for
  <em>stream</em>, or -1 if an error occurs.</p>

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  <div class="name-format">
    fwrite
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int fwrite( const void *buffer, size_t size, size_t count, FILE *stream );
</pre>

  <p>The fwrite() function writes, from the array <em>buffer</em>,
  <em>count</em> objects of size <em>size</em> to <em>stream</em>. The
  return value is the number of objects written.</p>

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    <a href="fread.html">fread</a><br>
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  <div class="name-format">
    getc
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int getc( FILE *stream );
</pre>

  <p>The getc() function returns the next character from
  <em>stream</em>, or <strong>EOF</strong> if the end of file is
  reached. getc() is identical to <a href="fgetc.html">fgetc</a>(). For
  example:</p>
  <pre class="example-code">
   int ch;
   FILE *input = fopen( &quot;stuff&quot;, &quot;r&quot; );             

   ch = getc( input );
   while( ch != <strong>EOF</strong> ) {
     printf( &quot;%c&quot;, ch );
     ch = getc( input );
   }            
</pre>

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  <div class="name-format">
    getchar
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  int getchar( void );
</pre>

  <p>The getchar() function returns the next character from
  <strong>stdin</strong>, or <strong>EOF</strong> if the end of file is
  reached.</p>

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  <div class="name-format">
    gets
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;stdio.h&gt;
  char *gets( char *str );
</pre>

  <p>The gets() function reads characters from <strong>stdin</strong>
  and loads them into <em>str</em>, until a newline or
  <strong>EOF</strong> is reached. The newline character is translated
  into a null termination. The return value of gets() is the read-in
  string, or <strong>NULL</strong> if there is an error.</p>

  <p>Note that gets() does not perform bounds checking, and thus risks
  overrunning <em>str</em>.  For a similar (and safer) function that
  includes bounds checking, see <a href="fgets.html">fgets()</a>.</p>

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