Answer 1

I don't usually use cin.get(), so I'm sorry I can't help you with that, but I can tell you cin.ignore() is used to discard whatever is stored in the input stream, it is commonly used to discard an invalid data in the stream, which may disturb your further steps in reading inputs.

eg:
cin >> intData;
if(!cin.good()) // there's a problem with input
cin.ignore(); // discard the last input

Hth, cmiiw