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<html>
<head>
<title>EAGLE Help: strsub()</title>
</head>
<body bgcolor=white>
<font face=Helvetica,Arial>
<hr>
<i>EAGLE Help</i>
<h1><center>strsub()</center></h1>
<hr>
<dl>
<dt>
<b>Function</b>
<dd>
Extracts a substring from a string.
<p>
<dt>
<b>Syntax</b>
<dd>
<tt>string strsub(string s, int start[, int length]);</tt>
<p>
<dt>
<b>Returns</b>
<dd>
The <tt>strsub</tt> function returns the substring indicated by
the <tt>start</tt> and <tt>length</tt> value.
<p>
The value for <tt>length</tt> must be positive, otherwise an empty string
will be returned. If <tt>length</tt> is ommitted, the rest of the string
(beginning at <tt>start</tt>) is returned.
<p>
If <tt>start</tt> points to a position outside the string, an empty string
is returned.
<p>
</dl>
<b>Example</b>
<pre>
string s = "This is a string";
string t = strsub(s, 4, 7);
printf("The extracted substring is: %s\n", t);
</pre>
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