The GNU Compiler Collection (GCC) is a compiler system produced by the GNU Project supporting various programming languages.
Below are the steps to compile C++ program using GCC:
    e.g. Your c++ source file is in Desktop named hello.cpp


1. Open up terminal
        (applications >>> accessories >>> terminal)
2. Go to path where your source file can be found
        cd Desktop
3. Compile
        g++ hello.cpp
4. Run the executable file created
        ./a.out

Note: a.out is the default executable file created when u you compile C++ source file using GCC. To overwrite this, when compiling supply with the filename you want in gcc command -o parameter. e.g. g++ -o hello.out hello.cpp