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<HTML><HEAD> <TITLE>预处理命令</TITLE></HEAD><BODY BGCOLOR="FFFFFF"><TABLE WIDTH="100%" BGCOLOR="EEEEFF"><TR><TD> <A HREF="index.html">cppreference.com</A> -> 预处理命令</TD></TR></TABLE><H3>预处理命令</H3><TABLE> <TR BGCOLOR="EEEEFF"><TD><A HREF="preproc_details.html#sharp" >#, ##</A></TD> <TD>manupilate字符串</TD></TR> <TR><TD><A HREF="preproc_details.html#define" >#define</A></TD> <TD>定义变量</TD></TR> <TR BGCOLOR="EEEEFF"><TD><A HREF="preproc_details.html#error" >#error</A></TD> <TD>显示一个错误消息</TD></TR> <TR><TD><A HREF="preproc_details.html#if" > #if, #ifdef, #ifndef, #else, #elif, #endif</A></TD> <TD>条件操作符</TD></TR> <TR BGCOLOR="EEEEFF"><TD><A HREF="preproc_details.html#include" >#include</A></TD> <TD>插入其它文件的内容</TD></TR> <TR><TD><A HREF="preproc_details.html#line" >#line</A></TD> <TD>设置行和文件信息</TD></TR> <TR BGCOLOR="EEEEFF"><TD><A HREF="preproc_details.html#pragma" >#pragma</A></TD> <TD>执行特殊命令</TD></TR> <TR><TD><A HREF="preproc_details.html#undef" >#undef</A></TD> <TD>取消定义变量</TD></TR> <TR BGCOLOR="EEEEFF"><TD><A HREF="preproc_details.html#predefined" >预定义变量</A></TD> <TD>其它变量</TD></TR></TABLE></BODY></HTML><br><html>
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