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<title>fopen function</title>
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<h1>fopen function</h1>
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<p>
<b>fopen</b> is used to open a file for read, write or update.
<a href="../MISC/stdfiles.html">stdin, stdout & stderr</a> are opened
by the system at execution time.
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<pre>
Library: stdio.h
Prototype: FILE *fopen(const char *filename, const char *mode);
Syntax: FILE *fp;
fp = fopen( "/etc/printcap", "r");
</pre>
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<h2>Notes:</h2>
<pre>
filename - is the name of the file.
mode - r - read file.
- w - Write to file.
- a - Append to file.
</pre>
<hr>
<h2>Example Programs:</h2>
<img src=../../GRAPHICS/computer.gif>
<a href="../EXAMPLES/read_file.c"> Example program.</a><p>
<hr>
<h2>See Also:</h2>
<dl compact>
<dt><img src=../../GRAPHICS/whiteball.gif>
<dd><a href="fgetc.html">fgetc</a> Get a character from a file.
<dt><img src=../../GRAPHICS/whiteball.gif>
<dd><a href="fgets.html">fgets</a> Get a record from a file.
<dt><img src=../../GRAPHICS/whiteball.gif>
<dd><a href="files.html">fputc</a> Put a character into a file. MAN PAGE.
<dt><img src=../../GRAPHICS/whiteball.gif>
<dd><a href="fprintf.html">fprintf</a> Put a formatted line into a file.
<dt><img src=../../GRAPHICS/whiteball.gif>
<dd><a href="fclose.html">fclose</a> Close a file.
<dt><img src=../../GRAPHICS/whiteball.gif>
<dd><a href="pclose.html">pclose</a> Close a pipe.
<dt><img src=../../GRAPHICS/whiteball.gif>
<dd><a href="system.html">system</a> Open a pipe.
<dt><img src=../../GRAPHICS/man.gif>
<dd><a href="../MAN/ferror.htm">ferror</a>.
Check error code on a file stream.
<dt><img src=../../GRAPHICS/man.gif>
<dd><a href="../MAN/ferror.htm">feof</a>.
Check for EOF on a file stream.
</dl>
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<address>Martin Leslie
</address><p>
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