add cin.clear() to prevent endless loop if user enters ^C. Also tweak comments, etc.
add cin.clear() to prevent endless loop if user enters ^C.
Also tweak comments, etc.

tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem