This is for my further reference.

Vim

This methord will give different beautiful colours to functions, strings, comments, keywords, etc f

or c, c+, etc.

For ubuntu first install the package vim-full. Then make a file in your home directory with the name .vimr. Type this in command line:

vi  ~/.vimrc

Put this line in this file:

:syntax enable

Then you are done. Next time you will see beautiful colours in your source code.