📄 switch.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head> <meta name="generator" content= "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org"> <title>switch</title> <link href="../cppreference.css" rel="stylesheet" type="text/css"></head><body><table> <tr> <td> <div class="body-content"> <div class="header-box"> <a href="../index.html">cppreference.com</a> > <a href= "index.html">C/C++ Keywords</a> > <a href= "switch.html">switch</a> </div> <div class="name-format"> switch </div> <div class="syntax-name-format"> Syntax: </div> <pre class="syntax-box"> switch( expression ) { case A: statement list; break; case B: statement list; break; ... case N: statement list; break; default: statement list; break; }</pre> <p>The switch statement allows you to test an expression for many values, and is commonly used as a replacement for multiple <a href= "if.html">if</a>()...<a href="else.html">else</a> <a href= "if.html">if</a>()...<a href="else.html">else</a> <a href= "if.html">if</a>()... statements. <a href="break.html">break</a> statements are required between each <a href="case.html">case</a> statement, otherwise execution will "fall-through" to the next <a href="case.html">case</a> statement. The <a href= "default.html">default</a> case is optional. If provided, it will match any case not explicitly covered by the preceding cases in the switch statement. For example:</p> <pre class="example-code"> char keystroke = getch(); switch( keystroke ) { case 'a': case 'b': case 'c': case 'd': KeyABCDPressed(); break; case 'e': KeyEPressed(); break; default: UnknownKeyPressed(); break; } </pre> <div class="related-name-format"> Related topics: </div> <div class="related-content"> <a href="break.html">break</a><br> <a href="case.html">case</a><br> <a href="default.html">default</a><br> <a href="if.html">if</a> </div> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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