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About HPP Files

An .hpp file is a header file that contains declarations and definitions used by programs written in C++. HPP files commonly include class definitions, function declarations, templates, constants, and other code that multiple parts of a project can share. They help developers organize C++ programs into reusable components and share the same interfaces across multiple source files.

Developers have used C++ header files since the language emerged in the 1980s, as they needed ways to organize increasingly complex applications and reusable libraries. The .hpp extension is commonly used to distinguish C++ headers from .h files, although this naming convention is not mandatory and does not guarantee which language a file contains. may encounter HPP files when developing games, desktop applications, system software, libraries, or other C++ projects.

You can open and view the contents of an .hpp file with a source code editor or plain text editor. However, to build an application that uses the header, you generally need a compatible C++ compiler and development environment.