A .cpp file is a source code file written in the C++ programming language. It contains human-readable instructions that are compiled into machine-executable code. C++ is a powerful, general-purpose programming language widely used for developing operating systems, game engines, high-performance applications, and more. The code within a .cpp file typically includes declarations of functions, classes, and variables, as well as the implementation of these elements. These files are essential for software development projects using C++. They are often part of larger projects that include multiple .cpp files, header files (.h or .hpp), and other resources. The compilation process transforms the .cpp file into an object file, which is then linked with other object files and libraries to create the final executable program. C++ allows for both procedural and object-oriented programming paradigms, making it a versatile choice for a wide range of applications. The language emphasizes performance and control over system resources, making it suitable for demanding tasks.