1.  Define a class called employee that has a first name,
last name, salary, and the name of the university where the
employee graduated as private data members.  (Note: Salary
should be represented in whole dollars.  No cents)  Other
questions will tell you what public member functions the
class should have.

2.  Write a member function of employee called get_salary
that returns the salary of the employee.

3.  Write a member function of employee called raise that
takes an integer as parameter and raises the salary by that
amount.

4.  Write a member function of employee called get_university
that takes a string as parameter.  The function should put the
university where the employee graduated into that string.