C Application -- Text Input/Output

Currently the application I have does: User inputs x (string), y (variable) and z (variable) Application ensures that y <20 and x <10 Saves to text file. You can also view previously entered inputs and amend/delete them. Must be a console application, and have commented code where needed. I'd now like it to do extra functionality. User inputs x (string), y (variable), z (variable). The total of y in the entire application (as in all the records) cannot exceed 150. So it must check that y <20 AND that the total y for the application is under 150. If y exceeds 150 the app will display a warning and revert the user back to the main menu. After x, y and z have been inputted the user is moved to a new screen where: the user enters "v" (int) which is a number. y is multiplied by 10 and then that number multiplied by v, we'll call this final variable "t'. T is then displayed on the screen and the user can either accept this number and continue OR reject it and the user is rolled back to the main menu. After accepting "V" the user moves to the final screen where he enters: n (string), nb (string) and B... B has only 4 options (eg, after typing x, y and z it moves to a new screen with an additional menu where you select A for ... b for ... etc. The 4 options are: Option A -- "N" Option B -- "S" Option C -- "M" Option D -- "O" -- When entering this value it moves to a new screen and you can enter a custom entry for B. Finally, after these entries the application writes this data to the text file. The ability to edit previous records is no longer needed, however the total of y should be viewable from the main menu. (eg, y is currently at 123. This leaves 37 spare.) Notes. The Option B would be easiest to implement if used with a class design that uses inheritance, please ensure the code has nice comments! ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Mac/Windows/Please refrain from using DOS only classes.