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  2. C++ Standard Library - Wikipedia

    en.wikipedia.org/wiki/C++_Standard_Library

    C++23 instead considers these headers as useful for interoperability with C, and recommends against their usage outside of programs that are intended to be both valid C and C++ programs. No other headers in the C++ Standard Library end in ".h". Features of the C++ Standard Library are declared within the std namespace.

  3. Include directive - Wikipedia

    en.wikipedia.org/wiki/Include_directive

    The C preprocessor (used with C, C++ and in other contexts) defines an include directive as a line that starts #include and is followed by a file specification. COBOL defines an include directive indicated by copy in order to include a copybook. Generally, for C/C++ the include directive is used to include a header file, but can

  4. errno.h - Wikipedia

    en.wikipedia.org/wiki/Errno.h

    errno.h is a header file in the standard library of the C programming language. ... C++11 additionally defines many of the same values found within the POSIX ...

  5. include guard - Wikipedia

    en.wikipedia.org/wiki/Include_guard

    Please help improve it to make it understandable to non-experts, without removing the technical details. ( September 2018 ) ( Learn how and when to remove this message ) In the C and C++ programming languages, an #include guard , sometimes called a macro guard , header guard or file guard , is a way to avoid the problem of double inclusion when ...

  6. Eigen (C++ library) - Wikipedia

    en.wikipedia.org/wiki/Eigen_(C++_library)

    Eigen is a high-level C++ library of template headers for linear algebra, matrix and vector operations, geometrical transformations, numerical solvers and related algorithms. . Eigen is open-source software licensed under the Mozilla Public License 2.0 since version 3.1

  7. Component Object Model - Wikipedia

    en.wikipedia.org/wiki/Component_Object_Model

    Nano-COM can be expressed in a portable C++ header file. Nano-COM extends the native ABI of the underlying instruction architecture and OS to support typed object references – whereas a typical ABI focuses on atomic types, structures, arrays and function calling conventions. A Nano-COM header file defines or names at least three types:

  8. Precompiled header - Wikipedia

    en.wikipedia.org/wiki/Precompiled_header

    In computer programming, a precompiled header (PCH) is a (C or C++) header file that is compiled into an intermediate form that is faster to process for the compiler.Usage of precompiled headers may significantly reduce compilation time, especially when applied to large header files, header files that include many other header files, or header files that are included in many translation units.

  9. C syntax - Wikipedia

    en.wikipedia.org/wiki/C_syntax

    A snippet of C code which prints "Hello, World!". The syntax of the C programming language is the set of rules governing writing of software in C. It is designed to allow for programs that are extremely terse, have a close relationship with the resulting object code, and yet provide relatively high-level data abstraction.