"Fundamentals of programming" computer engineering project: Vehicom

This project is a part of a university course called "Fundamentals of programming". The language I used it's called C+-, and it's been developed by teachers at UNED.
Vehicom is a vehicle renting management program, implemented using 4 modules.

The main screen allows the user to choose one of the functions specified in the project requirements:
 

The first function allows the user to register a new customer.
 

 The user can also register a new vehicle:

The programs allows the user to see a table with vehicle near their polar coordinates and select one:

Another screen allows the user to return the vehicle.

The program can generate statistics about vehicle usage in minutes for a specific customer in a month.