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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>Got Ya</title>
+<head>
+<script language="JavaScript">
+</script>
+</head>
+<body bgcolor="#ffffcc">
+<hr>
+<center>
+<h1>Got Ya</h1>
+</center>
+<hr>
+<ul>
+<li><a href="#num1">== and =</a>
+<li><a href="#num1">if</a>
+</ul>
+
+<a name=num1>
+<hr>
+An error which almost every C programmer has made is shown below:
+<pre>
+ main()
+ {
+ int left=10;
+
+ if ( left = 5 )
+ {
+ puts(" Values are equal...");
+ }
+ }
+</pre>
+The program assigns 5 to the variable <b>left</b> and returns 5.
+This is interpreted as <a href="../CONCEPT/true_false.html">TRUE</a> and causes the
+<a href="../FUNCTIONS/puts.html">puts</a> statement to be executed everytime.
+<p>
+Here is the corrected program.
+<pre>
+ main()
+ {
+ int left=10;
+
+ if ( left == 5 ) /* Double equals required. */
+ {
+ puts(" Values are equal...");
+ }
+ }
+</pre>
+
+<hr>
+
+<hr>
+<h2>See Also:</h2>
+
+<img src="../../GRAPHICS/whiteball.gif">
+<a href="idioms.html">Coding idioms</a>.<p>
+
+<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="keywords.html"> Keywords</a>
+</td><td width="25%">
+<a href="../FUNCTIONS/funcref.htm"> Functions</a>
+</td>
+</tr>
+</table>
+</center>
+<p>
+<hr>
+<address>Martin Leslie
+</address><p>
+</body>
+</html>