how to install GMT

now, I would like to share how to install GMT on windows. this is based on my own experience. first of all you have to have the installer of GMT. you can visit it to download GMT installer, choose your windows bit. 32 or 64 bit.
then you also have to download GhostScript (for reading postscript language) and GhostView (for graphical interface of GhostScript for windows) to display the GMT result and  GAWK, which honestly I still don't know the function of it, but at first just do my command.

just click "next" until you finish install it then restart your computer.
to make sure that your GMT installed well, open command prompt that type "pscoast". if GMT have installed properly it will appear pscoast definition and options of pscoast command.