C++11 for Programmers by Paul J. Deitel & Harvey M. Deitel

Author:Paul J. Deitel & Harvey M. Deitel [Deitel, Paul J. & Deitel, Harvey M.]
Language: eng
Format: epub
Tags: Computer Science, Education & Reference, Computers & Technology, Programming Languages, C#, Languages & Tools, Programming, C
ISBN: 9780133439854
Publisher: Prentice Hall
Published: 2013-03-22T14:00:00+00:00

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Fig. 12.13. CommissionEmployee class header.

Click here to view code image

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1 // Fig. 12.14: CommissionEmployee.cpp

2 // CommissionEmployee class member-function definitions.

3 #include <iostream>

4 #include <stdexcept>

5 #include "CommissionEmployee.h" // CommissionEmployee class definition

6 using namespace std;

7

8 // constructor

9 CommissionEmployee::CommissionEmployee( const string &first,

10 const string &last, const string &ssn, double sales, double rate )

11 : Employee( first, last, ssn )

12 {

13 setGrossSales( sales );

14 setCommissionRate( rate );

15 } // end CommissionEmployee constructor

16

17 // set gross sales amount

18 void CommissionEmployee::setGrossSales( double sales )

19 {

20 if ( sales >= 0.0 )

21 grossSales = sales;

22 else

23 throw invalid_argument( "Gross sales must be >= 0.0" );

24 } // end function setGrossSales

25

26 // return gross sales amount

27 double CommissionEmployee::getGrossSales() const

28 {

29 return grossSales;

30 } // end function getGrossSales

31

32 // set commission rate

33 void CommissionEmployee::setCommissionRate( double rate )

34 {

35 if ( rate > 0.0 && rate < 1.0 )

36 commissionRate = rate;

37 else

38 throw invalid_argument( "Commission rate must be > 0.0 and < 1.0" );

39 } // end function setCommissionRate

40

41 // return commission rate

42 double CommissionEmployee::getCommissionRate() const

43 {

44 return commissionRate;

45 } // end function getCommissionRate

46

47 // calculate earnings; override pure virtual function earnings in Employee

48 double CommissionEmployee::earnings() const

49 {

50 return getCommissionRate() * getGrossSales();

51 } // end function earnings

52

53 // print CommissionEmployee's information

54 void CommissionEmployee::print() const

55 {

56 cout << "commission employee: ";

57 Employee::print(); // code reuse

58 cout << "\ngross sales: " << getGrossSales()

59 << "; commission rate: " << getCommissionRate();

60 } // end function print

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