wow, thats alot of stuff in your header file....
anyways, heres some constructive criticism.
instead of using string for all your variables, why not just use char? since your answers are either Y or N, you dont need to use string.
and, why are you doing so much stuff in main? alot of that stuff can be done in multiple functions, making your code look much neater and easy to proofread after you have written it. plus, it gives u some practice in calling functions and creating prototypes
ignore this if u want...