ultifinitus is pretty much right, Win32 is intimidating but overall not that difficult to get the hang of. If not windows then what OS are you writing on? If it's Mac, *nix or whatever there are other libraries avalible to create GUI's with.
In any CLI, you can just display a list of options and accept input from the user. Make it loop until the user wants to quit. For example: Menu
1) do this
2) do that
3) quit
Your selection: 1
this
Menu
1) do this
2) do that
3) quit
Your selection: 3