C/C++ Preprocessor Reference

Visual Studio 2008

The C/C++ Preprocessor Reference explains the preprocessor as it is implemented in Microsoft C/C++. The preprocessor performs preliminary operations on C and C++ files before they are passed to the compiler. You can use the preprocessor to conditionally compile code, insert files, specify compile-time error messages, and apply machine-specific rules to sections of code.

In This Section

Preprocessor Directives: Describes directives, typically used to make source programs easy to change and easy to compile in different execution environments.
Preprocessor Operators: Discusses the four preprocessor-specific operators used in the context of the #define directive.
Predefined Macros: Discusses predefined macros as specified by ANSI and Microsoft C++.
Pragmas: Discusses pragmas, which offer a way for each compiler to offer machine- and operating system-specific features while retaining overall compatibility with the C and C++ languages.

Related Sections

C++ Language Reference: Provides reference material for the Microsoft implementation of the C++ language.
C Language Reference: Provides reference material for the Microsoft implementation of the C language.
Building a C/C++ Program: Provides links to topics discussing compiler and linker options.
Visual C++ Libraries: Provides links to the various libraries provided with Visual C++, including ATL, MFC, OLE DB, the C run-time library, and the Standard C++ Library.
VC++ Directories, Projects and Solutions, Options Dialog Box: Describes the user interface in Visual Studio that enables you to specify the directories that the project system will search to locate files for your C++ project.