'''A binary file Transport.dat stores records in the following format:[StudentId, StudentName, RouteNo, RouteName]
Write suitable functions for the following:
>addStudent()
Accept the details of a student and append the record to the binary file Transport.dat.
>changeRoute(routeNo , newRouteName)
Display student names with that route.
Update the route name to the passed value
Display if no student in that route
'''