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<title>STDIN, STDOUT, STDERR</title>
<body bgcolor="#ffffcc">
<hr>
<center>
<h1>STDIN, STDOUT, STDERR</h1>
</center>
<hr>
<p>
These three file pointers are
automatically defined when a program
executes and provide access to the keyboard and screen.
<p>
<h2>stdin</h2>
By default <b>stdin</b> accesses the keyboard. Functions that read
stdin include...
<ul>
<li><a href=../FUNCTIONS/gets.html>gets</a>
<li><a href=../FUNCTIONS/getchar.html>getchar</a>
</ul>
The following functions can access <b>stdin</b>
<ul>
<li>fgets
<li>fgetc
<li>fscanf
</ul>
<a href=../EXAMPLES/stdin.c><img src=../../GRAPHICS/computer.gif></a>
stdin example program.
<h2>stdout</h2>
stdout sends data to the screen. Functions that write to stdout
include....
<ul>
<li><a href=../FUNCTIONS/printf.html>printf</a>
<li><a href=../FUNCTIONS/puts.html>puts</a>
<li>putchar
</ul>
<h2>stderr</h2>
stderr also writes to the screen. If you are using a Unix based system
the data sent to stdout and stderr can be seperated and sent to
different places.
Functions that could write to stderr include...
<ul>
<li>fprintf
<li>fputs
</ul>
<hr>
<p>
<center>
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<p>
<hr>
If you wish to create file pointers to perform I/O to other devices
you should use <a href=../FUNCTIONS/fopen.html>fopen</a>
<hr>
<address>Martin Leslie
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