How are keywords made

Question

Any explicit knowledge on how c++ keywords are made, example the goto keyword or the virtual key word.
Or if you have idea in other programming language, I did like to know.

Answer 1

Compilers for languages like c++, or interpreters for script languages, are programs that read the source code (text file) and change it into binary that the computer can execute.
So. in a nutshell, someone decided what the keywords mean, and the compiler is written accordingly.
Google "How to write a compiler" if you are interested.: -)