Here are some predefined macros in C programming. MacroValue __DATE__A string containing the current date. __FILE__A string containing the file name. __LINE__An integer representing the current line number. __STDC__If follows ANSI standard C, then the value is a nonzero integer. ...
In this example, we have todefine two macros YES with the constant value 1 and NO with the constant value 0by using#definepreprocessor directive in C programming language. Macros definitions #define YES 1 #define NO 0 Example #include<stdio.h>#defineYES 1#defineNO 0//function to check and...
C/C++二次幂宏 c++macrospreprocessor-directive 4 我的二次幂计算能力不如应该,所以我想也许我可以用#define定义一些东西。 不幸的是,当涉及到预处理器指令时,我非常缺乏经验,而且我无法弄清楚如何做像for循环这样的事情。 我查看了: http://www.cplusplus.com/doc/tutorial/preprocessor https://msdn.microsoft....
It is used for undefined macros. Whenever we realize that no more macro is required in the program, we simply write: #undef macro-name There is no requirement for any character sequence. Programming Example 4 #include< stdio.h> #define AVISHEK avi intmain() { #undef Avi # if defined(av...
Predefined macros Pragmas Microsoft Specific You can obtain a listing of your source code after preprocessing by using the /E or /EP compiler option. Both options invoke the preprocessor and send the resulting text to the standard output device, which, in most cases, is the console. The ...
C/C++ preprocessor reference Preprocessor Preprocessor New preprocessor overview Phases of translation Preprocessor directives Preprocessor operators Preprocessor operators Stringizing operator (#) Charizing operator (#@) Token-pasting operator (##) Preprocessor macros (C/C++) Preprocessor grammar summary (C/...
This feature is not currently implied by any other flags, but we are planning to include it in /std:c++latest once we stabilize the public SDK headers from using non-conformant macros. Using the latest Windows SDK is advised, as many of the noisy warnings are fixed in later SDK versi...
现在,已知C 预处理器不是图灵完备的,因此上述代码永远不会扩展为A B。如果那样的话,GLUE将展开MACRO,MACRO将展开GLUE。这将导致无限递归的可能性,可能意味着 Cpp 具有图灵完备性。因此,对于那些预处理器巫师来说,遗憾的是,上述宏不扩展是一个保证。
defined operator Simplifies the writing of compound expressions in certain macro directives See also Preprocessor directives Predefined macros c/c++ preprocessor referenceFeedback Was this page helpful? Yes No Provide product feedback | Get help at Microsoft Q&A English...
// The ## is unnecessary and does not result in a single preprocessing token. #define ADD_STD(x) std::##x // Declare a std::string ADD_STD(string) s; Comma elision in variadic macros The traditional MSVC preprocessor always removes commas before empty __VA_ARGS__ replacements. The ...