How to compile and run C/C++ in a Unix console/Mac terminal?

Question

How can I compile/run C or C++ in Unix console or a Mac terminal?

(I know it, forget it, and relearn it again. Time to write it down.)

Answer 1

Add following to get best warnings, you will not regret it. If you can, compile WISE (warning is error)

- Wall -pedantic -Weffc++ -Werror