How to determine whether a C/C++ compiler is installed on Windows? [closed]
There is no catch-all way to discover whether there is "a" C or C++ compiler installed, because different compilers are invoked in different ways. You could iterate through the common ones (e.g. running g++ from shell) but, really, you should know what software is running on your computer because you installed it. If you did not set up the computer, ask the person who did.