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When compiling source.cpp for the first time with the precompiled header feature turned on, the compiler will generate a precompiled header, header.pch.The next time, if the timestamp of this header did not change, the compiler can skip the compilation phase relating to header.hpp and instead use header.pch directly.
C++ (/ ˈ s iː p l ʌ s p l ʌ s /, pronounced "C plus plus" and sometimes abbreviated as CPP) is a high-level, general-purpose programming language created by Danish computer scientist Bjarne Stroustrup.
Traditionally, C++ code would be divided between a header file (typically with extension .h, .hpp or .hh) and a source file (typically with extension .cpp or .cc). The header file usually contained declarations of symbols while the source file contained the actual implementation, such as function implementations.
An include directive instructs a text file processor to replace the directive text with the content of a specified file.. The act of including may be logical in nature. The processor may simply process the include file content at the location of the directive without creating a combined file.
The C++ Standard Library provides several generic containers, functions to use and manipulate these containers, function objects, generic strings and streams (including interactive and file I/O), support for some language features, and functions for common tasks such as finding the square root of a number.
Translation units define a scope, roughly file scope, and functioning similarly to module scope; in C terminology this is referred to as internal linkage, which is one of the two forms of linkage in C. Names (functions and variables) declared outside of a function block may be visible either only within a given translation unit, in which case they are said to have internal linkage – they are ...
HPP + is structurally related to the selective dopaminergic neurotoxin MPTP (and its active metabolite MPP +), which induces Parkinson's disease-like symptoms in humans. [ 1 ] [ 2 ] HPP + is a neurotoxin specifically affecting serotonergic and dopaminergic neurons , and its neurotoxicity resembles that of MPTP.
In the context of the C or C++ programming languages, a library is called header-only if the full definitions of all macros, functions and classes comprising the library are visible to the compiler in a header file form. [1]