C++ ProjectsLesson 58Free preview

C++ Projects

This lesson is part of C++ · All levels

Summary

Real C++ projects rarely contain a single large file; typically the code is separated into a header (.h/.hpp) for declarations and a source file (.cpp) for implementation. Include guard or #pragma once prevents header being included many times, then the entire .cpp file is compiled separately and combined by the linker into one program. This separation makes compilation faster, code more organized, and easy to work with teams.

Key points

Header stores declarations and can be included by many .cpp files.
Once or include guard prevents double inclusion on the header. (#pragma)
Each file .cpp is compiled into an object file, then combined the linker into an executable.
Separate the declaration (header) and the implementation (source) so that the change does not trigger mass compilation.

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