.cpp File — C++ Source Code

C++ is a general-purpose programming language created by Bjarne Stroustrup at Bell Labs starting in 1979, extending C with object-oriented features, templates, and abstractions while maintaining C's performance characteristics. CPP files contain C++ source code for this compiled, statically-typed, multi-paradigm language that supports procedural, object-oriented, generic, and functional programming. C++ is used in performance-critical domains including game engines (Unreal Engine, Unity internals), operating systems, web browsers (Chrome, Firefox), databases (MySQL, MongoDB), compilers (GCC, LLVM/Clang), financial systems, embedded systems, and scientific computing. The language provides zero-cost abstractions, deterministic object lifetime through RAII (Resource Acquisition Is Initialization), templates for generic programming, and the Standard Template Library (STL) with containers, algorithms, and iterators. Modern C++ (C++11 through C++23) has added smart pointers, move semantics, lambda expressions, range-based for loops, concepts, coroutines, and modules that significantly improve safety and expressiveness. C++ remains one of the most widely used languages in industry despite its complexity.