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#define是C语言中提供的宏定义命令, the main purpose is to provide programmers with certain convenience in programming, and to a certain extent, improve the efficiency of the program, but students often do not understand the nature of the command in learning, always create some confusion here, in the programming of the misuse of the command, To make the program run inconsistent with the intended purpose, or to read the program written by others, the results of the

Macro definition in many languages can see its shadow, C #, C++,c, and so on, especially the system API inside a lot of macro definition, looking very bluffing people. Reasonable use of macro definition, you can make your code look more standardized, more convenient, especially in certain places. Using a macro definition can also make your own code look tall with wood on it!This article was changed from http://www.cnblogs.com/ios8/p/ios-hong.htmlOn-line macro definition of iOS more, I summed up

Usage One: const is used for class member variables, once defined cannot be modified, define is used for global constants, is not used for definitions of class member variables, const can be used in classes or outside classes, define cannot.Definition: const constant NAME = value; No $ symbolAccess: Class Name:: Constant Name or interface name:: Constant name as　　　　is to access the direct constant name outs

, we explained that the best way to create a class is to define a property with a constructor and define the method with a prototype. This approach also applies to the inheritance mechanism, using the object to impersonate the inheritance constructor property, using the prototype chain to inherit the method of the prototype object . Rewrite the previous example in either of these ways, with the following co

Gradle-define Task and Gradle-define Task We talked about the Groovy syntax and the execution sequence of Gradle. This article describes the definition of a Task. Task can be understood as the execution unit of Gradle, which is too important. According to the previous analysis, Gradle completes the specific build tasks through tasks. Let's take a look at the definition of tasks. The simplest and most stra

Section 2 Interface Definition Technically, an interface is a set of data structures that contain functional methods. Through this set of data structures, the customerCodeYou can call the functions of component objects. The interface is defined in the following format:[Attributes] [modifiers] interface identifier [: Base-list] {interface-body} [;] Note: 1. attributes (optional): additional definition information. 2. modifiers (optional): allowed modifiers include new and four acce

Tags: style blog http io color ar os using SPTo write a rule in Excel, you only need to write rules in the table and use the Oracle Policy Modeling style to identify the type of information in the cell.So that these rules can be compiled and used in Oracle determinations Engine. You can create any number of rule sheets in your document.Understanding styles for a rule tableThe Excel rules that you intend to compile in Oracle policy Modeling need to be styled with the style tags provided with the

The following is the right border of the set button and the color of the bottom border is red and the frame size is 3DP, such as:Create a new Buttonstyle.xml file in drawable with the following contents:XML version= "1.0" encoding= "UTF-8"?> layer-listxmlns:android= "Http://schemas.android.com/apk/res/android"> Hyphen Color Value -Item> Shape> SolidAndroid:color= "#ff0000" /> Shape> Item> body Background color value - ItemAndroid:bottom= "3DP"Android:right=

As shown below: The above is a small series for everyone to use JSON to define functions, in which you can define the implementation of a number of functions all content, I hope that we support cloud Habitat Community ~

The first method, defined in Spring-servlet.xmlThe second method, Web. XML, defines the processing pageI know that there are two ways to configure Error-page in Web. XML, one is to configure by error code, but to configure it by the type of exception, respectively, as follows:A. Configuring Error-page with error codesEg.The above is configured to jump to the error handling page error.jsp when the system has a 500 error (that is, a server internal error).two. Configuring Error-page by type of e

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 definitions are also available in our common stdio.h header files, such as: #define BUFSIZ 1024//Buffer size #define EOF ( -1

#define是C语言中提供的宏定义命令, the main purpose is to provide programmers with certain convenience in programming, and to a certain extent, improve the efficiency of the program, but students often do not understand the nature of the command in learning, always create some confusion here, in the programming of the misuse of the command, To make the program run inconsistent with the intended purpose, or to read the program written by others, the results of the

Jency LeeLinks: http://www.cnblogs.com/Jency/articles/C_Cplusplus_define.html1. Simple define Definition #define MaxTime + A simple maxtime is defined, which represents 1000 if you write in the program if (i Compiler replaces maxtime with 1000 before processing the code. The definition of looks similar to a normal const definition, but it is also different because the definition of

# Define is a macro definition Command provided in C language. Its main purpose is to provide programmers with some convenience in programming and improve the program running efficiency to a certain extent, however, students often cannotUnderstanding the essence of this command always creates some confusion here. This command is misused during programming to make the program run differently from the expected purpose, or when reading a program written

. Let's take a closer look at the msdn example and have a good understanding. The following is an example of how to define a Unified Version macro. Assume that the project contains the resource script file resource. RC, and the unique version number is stored in define. h. Other CPP files that require version numbers contain this file. Let's take a look at define

For a long time, macro definition # define is used to define some simple constants. At most, it is used to define a function. It seldom pays attention to macro definition usage. Until the following code is displayed: #define PLAYSOUNDEFFECT(...) \[[GameManager sharedGameManager] playSoundEffect:@#__VA_ARGS__] I have

The difference between define () and const in php is described in detail. In php, both define () and const () can define constants. So what is the difference between define () and const? many programmers do not understand this, next I will introduce some differences between define