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authorTobias Klauser <tklauser@distanz.ch>2008-01-27 11:37:44 +0100
committerTobias Klauser <tklauser@xenon.tklauser.home>2008-01-27 11:37:44 +0100
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+<title>strtoul function</title>
+
+<head>
+<script language="JavaScript">
+</script>
+</head>
+
+<body bgcolor=#ffffcc>
+<hr>
+<center>
+<h1>strtoul function </h1>
+</center>
+<hr>
+<p>
+<b>strtoul</b> will convert a string to an unsigned long integer. An important
+feature
+of this function is the ability to accept data in various number bases
+and convert to decimal. If
+you are just working with decimal numbers,
+<a href="atoi.html">atoi</a> is probably an easer function to use.
+<hr>
+<pre>
+Library: stdlib.h
+
+Prototype: long int strtoul(const char *sptr, char **endptr, int base);
+
+Syntax: char string1[]="ff"; /* string to convert */
+ int base=16; /* Base 16 */
+ unsigned long int ans; /* Result */
+
+ ans = strtoul(string, NULL, 16);
+</pre>
+
+<hr>
+<h2>Notes</h2>
+The first argument must not contain a + or -.<p>
+
+The second argument (char **endptr) seems to be a waste of space! If
+it is set to NULL, STRTOL
+seems to work its way down the string until it finds an invalid character
+and then stops. All valid chars read are then converted if the string
+starts with an invalid character the function returns ZERO (0).
+<p>
+The Third argument (base) can have a value of 0 or 2-32.
+<ul>
+<li>0 - strtol will attempt to pick the base. Only Dec, Oct Hex supported.
+<li>2-31 - The base to use.
+</ul>
+<hr>
+<h2>Examples</h2>
+<img src=../../GRAPHICS/computer.gif>
+<a href="../EXAMPLES/strtol.c"> example program</a> (actually the strtol example, but its near enough).<p>
+<hr>
+<h2>See also:</h2>
+<p>
+
+<img src=../../GRAPHICS/whiteball.gif>
+<a href="atoi.html">atoi</a> String to integer conversion.
+<br>
+<img src=../../GRAPHICS/whiteball.gif>
+<a href="atof.html">atof</a> String to floating point conversion.
+<br>
+<img src=../../GRAPHICS/whiteball.gif>
+<a href="atol.html">atol</a> String to long integer conversion.
+<br>
+<img src=../../GRAPHICS/whiteball.gif>
+<a href="../MAN/strtod.htm">strtod</a>
+String to double conversion.
+<br>
+<img src=../../GRAPHICS/whiteball.gif>
+<a href="strtol.html">strtol</a> String to long integer
+conversion.
+
+
+<p>
+
+<hr>
+<p>
+<center>
+<table border=2 width="80%" bgcolor="ivory">
+<tr align=center>
+<td width="25%">
+<a href="../cref.html"> Top</a>
+</td><td width="25%">
+<a href="../master_index.html"> Master Index</a>
+</td><td width="25%">
+<a href="../SYNTAX/keywords.html"> Keywords</a>
+</td><td width="25%">
+<a href="funcref.htm"> Functions</a>
+</td>
+</tr>
+</table>
+</center>
+<p>
+<hr>
+<address>Martin Leslie
+</address><p>
+</body>
+</html>