file definition in c

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 ++ 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

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

Definition, operator, and Declaration of the Protection characters and variables in the C ++ header file 1. # ifndef # define # endif header file protection character During the compilation process. the cpp file is regarded as a separate file to be

Inline can be placed in. cpp, but only this CPP file can use it at this time.To make a public object, you must put it in. H. If you do not want to put it in. H, you must copy one copy of each CPP file.In fact, even if it is put in. H, it is also a

Macro definition in C # define usage, # 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,

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,

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

Can global variables be defined in header files that can be contained by multiple. c files? Why?Yes. The global variables with the same name are declared in static form in different C files. Variables and functions cannot be directly defined in the