A CPP file is a source code file written in C++, a popular programming language that adds features such as object-oriented programming to C. It may be a standalone program, containing all the code or one of many files referenced in a development project. CPP files must be compiled by a C++ compiler for the target platform before the code can be run.

CPP file open in Apple Xcode 10.1 C++ is one of the most popular programming languages, making CPP files very common among developers. You can open and edit CPP with a text editor, such as Microsoft Notepad or Apple TextEdit. However, programs that provide syntax highlighting, auto-completion, and other helpful tools are the most helpful for opening and editing CPP files. Some examples of these programs include Microsoft Visual Studio, Code Blocks, and Apple Xcode.