Chapter 10, Problem 5E

Modify the class LapTimer, as described in Exercise 13 of Chapter 9, as follows:

• Add an attribute for a file stream to which we can write the times
• Add a constructor

LapTimer (n, person, fileName)

for a race having n laps. The name of the person and the file to record the times are passed to the constructor as strings. The file should be opened and the name of the person should be written to the file. If the file cannot be opened, throw an exception.