I’m creating a program in C as a homework for college. In this project the user has to add packages and vehicles for a company. I need the user to enter a unique license plate for each vehicle, but the license plate can only have 2 letters and 4 numbers. I’m thinking this should be done with a do..while… But I’m not really sure how to verify letters. I do know that for numbers it’s gotta be
x < 0. It’s killing me because I don’t have a clue on how to do it with standard functions.