The Declaration tells the compiler some information to assist the compiler in syntax analysis and avoid compiler errors. The definition is to tell the compiler to generate some code that will be used by the connector. That is, the Declaration is for
compiler compiles a program, it compiles only one source file and generates the corresponding intermediate file (for the VC, the. obj file), and then the connector unifies all intermediate files to form an executable file. The problem is that when
C languageThe use of macros (macro) in macro C (and C + +) belongs to the scope of compiler preprocessing, which is a compile-time concept (not a run-time concept). The following is a simple summary of the use of macros encountered. About # and #
"Compiling"Templates requires maintenance ance from the programming environment.Language defines two broad strategies for instantiating templates:Dimensional Model and the separate compilation model. These models haveImptts on how we build our
One.#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,
"Definition" and "declaration" of functions are not the same thing. The definition of function refers to the establishment of function function, including specifying function name, function value type, formal parameter and its type, function body,
C ++ File include rule constant definition
To sum up, C ++'s function declaration, variable declaration, and class definition are written in the header file, while function implementation, variable definition, and class method implementation are
C ++ declaration and definitionC ++ declaration and definition
The Declaration is to introduce a name into the program. The definition provides a unique description of an object in the program. Declarations and definitions sometimes exist at the
Transferred from: http://www.cnblogs.com/rocketfan/archive/2009/10/02/1577361.html
1. compilation unit: A. cc or. cpp file is used as a compilation unit to generate. O.
2. Definition and declaration of common data types, Function Definition and
Class Definition details in C ++
Member variables
Each class can have no members or multiple members. The members can be data, functions, or type aliases.
A class can contain several public, private, and protected parts. Members defined in the
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