(Employee Class) Create a class called Employee that includes three pieces of information as data members—a first name (type string), a last name (type string) and a monthly salary (type int). [Note: In subsequent chapters, we’ll use numbers that contain decimal points (e.g., 2.75)— called floating-point values—to represent dollar amounts.] Your class should have a constructor that

Question

initializes the three data members. Provide a set and a get function for each data member. If the monthly salary is not positive, set it to 0. Write a test program that demonstrates class Employee’s capabilities. Create two Employee objects and display each object’s yearly salary. Then give each Em- ployee a 10 percent raise and display each Employee’s yearly salary again.

What will be an ideal response?

Answer 1

```
// Employee class definition.

#include // program uses C++ standard string class
using namespace std;

// Employee class definition
class Employee
{
public:
Employee( string, string, int ); // constructor sets data members
void setFirstName( string ); // set first name
string getFirstName(); // return first name
void setLastName( string ); // set last name
string getLastName(); // return last name
void setMonthlySalary( int ); // set monthly salary
int getMonthlySalary(); // return monthly salary
private:
string firstName; // Employee's first name
string lastName; // Employee's last name
int monthlySalary; // Employee's salary per month
}; // end class Employee
```
```
// Employee class member-function definitions.
#include
#include "Employee.h" // Employee class definition
using namespace std;

// Employee constructor initializes the three data members
Employee::Employee( string first, string last, int salary )
{
setFirstName( first ); // store first name
setLastName( last ); // store last name
setMonthlySalary( salary ); // validate and store monthly salary
} // end Employee constructor

// set first name
void Employee::setFirstName( string name )
{
firstName = name; // no validation needed
} // end function setFirstName

// return first name
string Employee::getFirstName()
{
return firstName;
} // end function getFirstName

// set last name
void Employee::setLastName( string name )
{
lastName = name; // no validation needed
} // end function setLastName

// return last name
string Employee::getLastName()
{
return lastName;
} // end function getLastName

// set monthly salary; if not positive, set to 0
void Employee::setMonthlySalary( int salary )
{
if ( salary > 0 ) // if salary is positive
monthlySalary = salary; // set monthlySalary to salary

if ( salary <= 0 ) // if salary is not positive
monthlySalary = 0; // set monthlySalary to 0
} // end function setMonthlySalary

// return monthly salary
int Employee::getMonthlySalary()
{
return monthlySalary;
} // end function getMonthlySalary
```
```
// Create and manipulate two Employee objects.
#include
#include "Employee.h" // include definition of class Employee
using namespace std;

// function main begins program execution
int main()
{
// create two Employee objects
Employee employee1( "Lisa", "Roberts", 4500 );
Employee employee2( "Mark", "Stein", 4000 );

// display each Employee's yearly salary
cout << "Employees' yearly salaries: " << endl;

// retrieve and display employee1's monthly salary multiplied by 12
int monthlySalary1 = employee1.getMonthlySalary();
cout << employee1.getFirstName() << " " << employee1.getLastName()
<< ": $" << monthlySalary1 * 12 << endl;

// retrieve and display employee2's monthly salary multiplied by 12
int monthlySalary2 = employee2.getMonthlySalary();
cout << employee2.getFirstName() << " " << employee2.getLastName()
<< ": $" << monthlySalary2 * 12 << endl;

// give each Employee a 10% raise
employee1.setMonthlySalary( monthlySalary1 + monthlySalary1 / 10 );
employee2.setMonthlySalary( monthlySalary2 + monthlySalary2 / 10 );

// display each Employee's yearly salary again
cout << "\nEmployees' yearly salaries after 10% raise: " << endl;

// retrieve and display employee1's monthly salary multiplied by 12
monthlySalary1 = employee1.getMonthlySalary();
cout << employee1.getFirstName() << " " << employee1.getLastName()
<< ": $" << monthlySalary1 * 12 << endl;

monthlySalary2 = employee2.getMonthlySalary();
cout << employee2.getFirstName() << " " << employee2.getLastName()
<< ": $" << monthlySalary2 * 12 << endl;
return 0; // indicate successful termination
} // end main
```
Employees' yearly salaries:
Lisa Roberts: $54000
Mark Stein: $48000
Employees' yearly salaries after 10% raise:
Lisa Roberts: $59400
Mark Stein: $52800