Lập trình hướng đối tượng: Workshop 10

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<b>Workshop 10</b>

<i><b>Task 1: Employee</b></i>

Design and code a class named <b>Employee</b> that holds information for an employee. Upon
instantiation, an Employee object may receive an <b>integer</b> identifying the employee and a <b>double </b>

holding the employee’s <b>salary</b>. If the object does not receive any data, or receives invalid data,
the object adopts a <b>safe empty state</b>.

Your Employee class includes the following member functions:

• <b>void display() const</b>

o Displays the employee number followed by the salary in (NNNN) - $$$$$$$$$$
format, where NNNN denotes the employee’s number and $$$$$$$$$$ denotes
the employee’s salary.

o Displays the employee number in a field of 4 and the salary in a field of 10 to 2
decimal places.

• <b>bool valid() const</b>

o Returns true if the object holds valid data, false otherwise.

Your Employee class is supported by an <b>extraction operator</b>. For the purpose of this workshop,
you may assume that the user will input the data correctly.

<i><b>Task 2: Manager</b></i>

Derive a class named <b>Manager</b> from <b>Employee</b> that holds information for a manager. Upon
instantiation, a Manager object may receive an <b>integer</b> identifying the <b>number of employees</b> for

which the manager is responsible, an <b>integer</b> identifying the <b>manager’s</b> <b>employee number</b> and
a <b>double</b> holding the manager’s <b>salary</b>. If the object does not receive any data or receives invalid
data, the object adopts a <b>safe empty state</b>.

Your Manager class includes the following member functions:

• <b>void display() const</b>

o Displays the employee information for the object followed by the number of
employees for which the manager is responsible in (NNNN) - $$$$$$$$$$ -
(RRR) format, where NNNN - $$$$$$$$$$ denotes employee information and
RRR denotes the number of employees.

• <b>bool valid() const</b>

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o Returns true if the object holds valid data, false otherwise.

Your Manager class is supported by an <b>extraction operator</b>. For the purpose of this workshop,
you may assume that the user will input the data correctly.

<i><b>Note:</b></i>

The main program that uses your class is The output from your program looks
something like:

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