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core/com.nokia.carbide.cpp.compiler.doc.user/html/c_compiler/c_ranged_cases.htm
author timkelly
Thu, 10 Dec 2009 13:45:47 -0600
branchRCL_2_4
changeset 671 80524b72f957
parent 0 fb279309251b
child 1641 2b3996fc09a1
permissions -rw-r--r--
Add S60 5.2 support.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<title>Ranges in case statements</title>
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<h3>Ranges in case statements</h3>
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<p>If you disable the <a href="../pragmas/p_ANSI_strict.htm">ANSI Strict</a> setting, the compiler allows ranges of values in a switch statement by using a special form of <span class="code">case</span> statement. A <span class="code">case</span> statement that uses a range is a shorter way of specifying consecutive case statements that span a range of values.</p>
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<p>The range form of a case statement is</p>
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<p class="listing">case <em>low</em> ... <em>high</em> : // note spaces around ellipsis character </p>
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<p>where low is a valid case expression that is less than high, which is also a valid case expression. A case statement that uses a range is applied when the expression of a switch statement is both greater than or equal to the low expression and less than or equal to the high expression.</p>
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<p class="note"><strong>NOTE</strong> Make sure to separate the ellipsis (<span class="code">...</span>) from the low and high expressions with spaces.</p>
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<div class="listing">
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  <h5>Listing 1. Ranges in case Statements</h5>
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  <p>switch (i)<br />
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    {<br />
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    case 0 ... 2: /* Equivalent to case 0: case 1: case 2: */<br />
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    j = i * 2;<br />
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    break;<br />
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    case 3:<br />
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    j = i;<br />
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    break;<br />
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    default:<br />
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    j = 0;<br />
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    break;<br />
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    } </p>
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</div>
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<div id="footer">Copyright &copy; 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div>
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FCL/sftools/dev/ide/carbidecpp