Programs written in C++ need to be compiled before they can be run. There is a large variety of compilers available depending on your operating system.
Most operating systems ship without a compiler, and they have to be installed later. Some common compilers choices are:
Please consult the appropriate compiler manual, on how to compile a C++ program.
Another option to use a specific compiler with its own specific build system, it is possible to let generic build systems configure the project for a specific compiler or for the default installed one.