IntroductionIn the field of business, to customer deployment projects, three projects to be integrated together, which results in different data formats, the path of the slash and backslash caused a lot of problems.Check out this information, here
1 used in the macro definition:
#define CV_ARE_SIZES_EQ (MAT1, mat2) \
((mat1)->rows = = (MAT2)->rows && (mat1)->cols = = (MAT2)-> Cols
2 used in printf, sometimes the statement in printf is too long, need to be split, then use the
Today, I checked some of the content in the header file provided by VC. Many statements are followed by backslashes. In my impression, only // indicates the annotation function, however, the backslash is only an escape character. But I have never
Do I need to convert the backslash into a slash when dirname (_ FILE _) is used? Define (AAA, str_replace (\, dirname (_ FILE _); include (AAA. bbbc. php); include (dirname (_ FILE __). bbbd. php); are the results the same? ------ Solution -------
There are many places in the C language where macro definitions are used, such as in header files to prevent header files from being repeatedly included:
#ifndef ctest_header_h
#define CTEST_HEADER_H
/header file content
#endif
Many macro
Original article address:
Http://blog.csdn.net/kindazrael/article/details/8108868
In C, Preprocessor is a powerful tool that makes your code easier to read and modify. With preprocessing code, you can redefine a part of the code to make your code
#define宏定义在C系开发中可以说占有举足轻重的作用. The underlying framework does not have to say, in order to compile optimization and convenience, as well as cross-platform capabilities, macros are heavily used, it can be said that the bottom of development left define
Original article address:
Http://blog.csdn.net/kindazrael/article/details/8108868
Objective-C: # define Usage Analysis
In C, Preprocessor is a powerful tool that makes your code easier to read and modify. With preprocessing code, you can redefine a
Use Dreamweavercs6 to define a PHP Site. because PHP files need to be processed by the Web server, you need to inform Dreamweaver of the location of the test server. You also need to tell the Dreamweaver test file to use the correct URL. Assume that
# DefineCreate a macro that is an identifier or parameterized identifier associated with the tag string. After defining the macro, the compiler can mark a string to replace each matching item of the identifier in the source file.Syntax
#
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