macro eyebrows

directory of this document Introduction to preprocessing Directives One, macro definition without parameters Second, macro definition with parameters Description: This C language topic is the prelude to learning iOS development. And for programmers with an object-oriented language development experience, you can quickly get started with C language. If you don't have programming experie

Introduction to preprocessing Directives One, macro definition without parameters Second, macro definition with parameters Description: This C language topic is the prelude to learning iOS development. And for programmers with an object-oriented language development experience, you can quickly get started with C language. If you don't have programming experience, or are no

Http://tech.e800.com.cn/articles/2009/727/1248665385863_1.html Many C ++ books advise us that C language macros are the first of all evil, but things are not as bad as we think, just like Goto. MacroA major role is to automatically generateCode. If the template can generate various types of code (type replacement) for us ),In fact, macros can generate new Code (replacement and addition of symbols) on the symbols ). You can find some macro Synt

Whim:In a language to write C + + plug-in, can replace the macro definition,You can do this by adding specific tags to C + +, such as The middle code can be translated into C + + code and compiled with the C + + compiler.Bothered:1.c++ macro must be anti-slash, and then need a lot of repetitive logic code, the need for macros to reduce the amount of code, to achieve efficient work;2. If there is a large num

This article first introduces Linux under the Classic macro definition, feel the wisdom of the geek, and then according to the classic definition for the next blog to pave the groundwork.Offsetof MacroDefinition:Gets the offset of the variable member (MEMBER) of the struct body (TYPE) in this struct. #define OFFSETOF (Type, MEMBER) ((size_t) ((TYPE *) 0)->member)Description: Gets the offset of the variable member (MEMBER) of the struct body (TYPE) in

First look at the macro definition of __user: #ifdef __checker__# define __user __attribute__ (Noderef, Address_space (1)) As you can see from the macro definition, the __user macro definition is valid under the condition that you configure the __CHECKER__ macro, and it is obvious that the

Macro definition of C Language notes (1) Symbolic Constants Macro definition is a replacement strategy in C language, that is, using preprocessing commands # define equals a string of (lengthy) texts with a name (macro, then you can batch use Macros in the source code. In the preprocessing phase, replace the macro in t

There are two types of macro definitions: macro definitions without parameters and macro definitions with parameters. Macro definition without ParametersThe general format of macro definition without parameters is: # Define macro

Some people regard macros as the beasts of the flood, and even require them to be completely abandoned from C/C ++. Some people regard macros as the supreme template, which is widely used in logic code. I personally think this is a matter of opinion and wisdom. It is unnecessary to abandon it. Let's look at some classic applications of macro in MFC and ATL, you will find that if you do not use macros to Implement Message ing and object ing, it will ma

C1 condition include As follows: Code # Ifndef main_h _ # Define main_h _ Other content # Endif When we see the header file, the function is to prevent this header file from being included multiple times. Repeated definitions occur when multiple include operations are performed. Therefore, you must use this definition in each header file. If you still don't know how to use it, you can see the standard header file of C, such as fcntl. h. 2. Conditional compilation As follows: Code # Ifdef _ deb

#springMessage ("xxx") to deal with internationalization:The way spring handles internationalization can be very special, because this tag can be used.This tag is used only after spring has integrated the velocity template. This template is available in:Org.springframework.web.servlet\src\main\java\org\springframework\web\servlet\view\velocity\spring.vmThe first macro in the velocity template is the springmessage tag, and there are other markers, whic

In the book or the novel print, you do not set reverse order printing, then the paper will need to be rearranged, because the first page is placed in the bottom, many words obviously not that time to another one of the tune. Here's how to use the macro method to solve Excel table in reverse order printing. Start the Excel table and click View-Macro-to record the macro