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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 1st October 2002), see www.w3.org"> <title>Pre-processor commands</title> </head> <body bgcolor="#ffffff"> <table width="100%" bgcolor="#eeeeff"> <tr> <td><a href="index.html">cppreference.com</a> -> Pre-processor commands</td> </tr> </table> <h3>Pre-processor commands</h3> <table> <tr bgcolor="#eeeeff"> <td><a href="preproc_details.html#sharp">#, ##</a></td> <td>manipulate strings</td> </tr> <tr> <td><a href="preproc_details.html#define">#define</a></td> <td>define variables</td> </tr> <tr bgcolor="#eeeeff"> <td><a href="preproc_details.html#error">#error</a></td> <td>display an error message</td> </tr> <tr> <td><a href="preproc_details.html#if">#if, #ifdef, #ifndef, #else, #elif, #endif</a></td> <td>conditional operators</td> </tr> <tr bgcolor="#eeeeff"> <td><a href="preproc_details.html#include">#include</a></td> <td>insert the contents of another file</td> </tr> <tr> <td><a href="preproc_details.html#line">#line</a></td> <td>set line and file information</td> </tr> <tr bgcolor="#eeeeff"> <td><a href="preproc_details.html#pragma">#pragma</a></td> <td>implementation specific command</td> </tr> <tr> <td><a href="preproc_details.html#undef">#undef</a></td> <td>undefine variables</td> </tr> <tr bgcolor="#eeeeff"> <td><a href="preproc_details.html#predefined">Predefined variables</a></td> <td>miscellaneous variables</td> </tr> </table> </body></html>⌨️ 快捷键说明
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