This composition example contains classes Date, Employee and EmployeeTest .Class Date declares instance variables month, day and year to represent a date. The constructor receives three int parameters. It has checks to validate the month—if the value is out-of-range the method throws an error message, same goes for day. Provide getters, setters and toString method. Class Employee has instance variables firstName, lastName, birthDate and hireDate. firstName and lastName are references to String objects. Members birthDate and hireDate are references to Date objects. • The Employee constructor takes four parameters—first, last, dateOfBirth and dateOfHire. Initialize the hireDate and birthDate with these objects by calling its constructor and setters. • When class Employee’s toString method is called, it returns a String containing the employee’s name and the String representations of the two Date objects. Each of these Strings is obtained with an implicit call to the Date class’s toString method. Class EmployeeTest creates two Date objects to represent an Employee’s birthday and hire date, respectively. Then creates an Employee object and initializes its instance variables by passing to the constructor two Strings (representing the Employee’s first and last names) and two Date objects (representing the birthday and hire date). Then display the values of its instance variables and demonstrate that the object was initialized properly.

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter11: Inheritance And Composition

Section: Chapter Questions

Problem 9PE

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This composition example contains classes Date, Employee and EmployeeTest .Class Date declares instance variables month, day and year to represent a date. The constructor receives three int parameters. It has checks to validate the month—if the value is out-of-range the method throws an error message, same goes for day.

Provide getters, setters and toString method.

Class Employee has instance variables firstName, lastName, birthDate and hireDate. firstName and lastName are references to String objects. Members birthDate and hireDate are references to Date objects.

• The Employee constructor takes four parameters—first, last, dateOfBirth and dateOfHire. Initialize the hireDate and birthDate with these objects by calling its constructor and setters.

• When class Employee’s toString method is called, it returns a String containing the employee’s name and the String representations of the two Date objects. Each of these Strings is obtained with an implicit call to the Date class’s toString method.

Class EmployeeTest creates two Date objects to represent an Employee’s birthday and hire date, respectively. Then creates an Employee object and initializes its instance variables by passing to the constructor two Strings (representing the Employee’s first and last names) and two Date objects (representing the birthday and hire date). Then display the values of its instance variables and demonstrate that the object was initialized properly.

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