Why C ++ header files you want to add #ifndef #define #endif - Code World

Why C ++ header files you want to add #ifndef #define #endif

Others 2019-08-27 07:20:02 views: null

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Origin www.cnblogs.com/focus-z/p/11415468.html

Why C ++ header files you want to add #ifndef #define #endif

What is the use of ifndef/define/endif in the header file?

What is the use of #ifndef and #endif in the header file? Why is it necessary in the header file?

#ifndef #define #endif

#ifndef, #define, #endif role

] [C ++ preprocessor directive # define, # ifdef, # ifndef, # endif ... C / C ++ preprocessor directive # define, # ifdef, # ifndef, # endif ...

C/C++ preprocessing directives #define, #ifdef, #ifndef, #endif…

C/C++ preprocessing directives #define, #ifdef, #ifndef, #endif…

Usage C preprocessor directives #define #ifdef #ifndef #ifdefined () #if! Defined () #endif

Talking about the role and usage of #ifndef, #define, #endif

The role of macro definition (#ifndef+#define+#endif)

The role of macro definition (#ifndef+#define+#endif)

Почему файлы заголовков C ++ вы хотите добавить #ifndef #define #endif

# Ifdef, # ifndef and #endif

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Использование C препроцессор директивы #define #ifdef #ifndef #ifdefined () #if! Defined () #endif

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#ifndef #define #endif

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#ifndef, #define, #endif Rolle

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