Date -day: int -month: int -year: int +Date() +Date(int, int, int) +Date(Date) +getDay(): int +set Day (int): void +getMonth(): int +setMonth(int): void +getYear(): int +set Year(int): void +show(): void Employee #employeeId: int #dateEmployed: Date + Employee() +Employee(int, Date) +Employee (Employee) +get EmployeeId(): int +set EmployeeId(int): void +getDate Employed(): Date +setDateEmployed (Date): void +show(): void ContractWorker -durationOfContract: int +ContractWorker() +ContractWorker (int, Date, int) +ContractWorker (ContractWorker) +get DurationOfContract(): int +set DurationOfContract (int): void +show(): void Manager -department: string +Manager() +Manager(int, Date, string) +Manager (Manager) +get Department (): string +setDepartment (string): void +show(): void Using the UML Diagram provided, assuming that all classes have been implemented, write code snippets in C++ or Java to demonstrate sub-type polymorphism using only the classes from the diagram.

Date -day: int -month: int -year: int +Date() +Date(int, int, int) +Date(Date) +getDay(): int +set Day (int): void +getMonth(): int +setMonth(int): void +getYear(): int +set Year(int): void +show(): void Employee #employeeId: int #dateEmployed: Date + Employee() +Employee(int, Date) +Employee (Employee) +get EmployeeId(): int +set EmployeeId(int): void +getDate Employed(): Date +setDateEmployed (Date): void +show(): void ContractWorker -durationOfContract: int +ContractWorker() +ContractWorker (int, Date, int) +ContractWorker (ContractWorker) +get DurationOfContract(): int +set DurationOfContract (int): void +show(): void Manager -department: string +Manager() +Manager(int, Date, string) +Manager (Manager) +get Department (): string +setDepartment (string): void +show(): void Using the UML Diagram provided, assuming that all classes have been implemented, write code snippets in C++ or Java to demonstrate sub-type polymorphism using only the classes from the diagram.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

Question

Date
-day: int
-month: int
-year: int
+Date()
+Date(int, int, int)
+Date(Date)
+getDay(): int
+set Day (int): void
+get Month(): int
+setMonth(int): void
+getYear(): int
+setYear(int): void
+show(): void
Employee
#employeeId: int
#dateEmployed: Date:
+ Employee()
+Employee(int, Date)
+Employee (Employee)
+getEmployeeId(): int
+set EmployeeId(int): void
+getDateEmployed(): Date
+setDate Employed (Date): void
+show(): void
Contract Worker
-durationOfContract: int
+ContractWorker()
+ContractWorker(int, Date, int)
+ContractWorker (ContractWorker)
+getDurationOfContract(): int
+setDurationOfContract (int): void
+show(): void
Manager
-department: string
+Manager()
+Manager(int, Date, string)
+Manager (Manager)
+getDepartment (): string
+setDepartment (string): void
+show(): void
Using the UML Diagram provided, assuming that all classes have been implemented, write code
snippets in C++ or Java to demonstrate sub-type polymorphism using only the classes from the
diagram.

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