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<head>
<title>cast</title>
</head>
<body bgcolor="#ffffcc">
<hr>
<center>
<h1>To cast, casting</h1>
</center>
<hr>
If you want to change the
<a href="../CONCEPT/data_types.html">datatype</a> of a variable
you have to use a technic called <b>cast</b>. For example if want to
change an <a href="../CONCEPT/data_types.html#int">int</a> to a
<a href="../CONCEPT/data_types.html#float">float</a>
you could use the following syntax:
<p>
<center>
<table border=1 width="80%" bgcolor="ivory">
<tr>
<td>
<pre>
main()
{
int var1;
float var2;
var2 = (float)var1;
}
</pre>
</td>
</tr>
</table>
</center>
<p>
As it happens this example would never be used in practice because C
would perform the conversion automatically.
What this example does show is the cast operator<b> () </b>. This states,
the result of the expression (in this case <b>var1</b>) is to be a
data type of <a href="../CONCEPT/data_types.html#float">float</a>.
<p>
<hr>
<h2>See Also:</h2>
<a href=../../CPLUSPLUS/CONCEPT/cast.html> C++ changes to cast.</a>
<p>
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<hr>
<address>Martin Leslie
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