0.6 Thiết kế chương trình theo hướng đối tượng  (Page 3/4)

3: #include<iomanip.h>

4: #include<string.h>

5: #include "person.h"

6:

7: Nguoi::Nguoi()

8: {

9: strcpy(HoTen,"");

10: strcpy(MaSo,"");

11: Luong=0;

12: }

13:

14: void Nguoi::Xuat() const

15: {

16: cout<<"Ma so:"<<MaSo<<",Ho va ten:"<<HoTen

17:       #9;<<",Luong:"<<setiosflags(ios::fixed)<<setprecision(0)<<Luong<<endl;

18: }

19:

20: void Nguoi::Nhap()

21: {

22: cout<<"Ma so:";

23: cin>>MaSo;

24: cin.ignore();

25: cout<<"Ho va ten:";

26: cin.getline(HoTen,MAX_TEN);

27: }

File STAFF.H

1: //STAFF.H

2 Định nghĩa lớp BienChe

3: #ifndef STAFF_H

4: #define STAFF_H

5:

5: #include "person.h"

6:

7: class BienChe: public Nguoi

8: {

9: protected:

10: float HeSoLuong;

11: float HeSoPhuCap;

12: public:

13: BienChe();

14: virtual void TinhLuong();

15: virtual void Nhap();

16: };

17:

18: #endif

File STAFF.CPP

1: //STAFF.CPP

2: Định nghĩa hàm thành viên cho lớp BienChe

3: #include "staff.h"

4:

5: BienChe::BienChe()

6: {

7: HeSoLuong=HeSoPhuCap=0;

8: }

9:

10: void BienChe::Nhap()

11: {

12: Nguoi::Nhap();

13: cout<<"He so luong:";

14: cin>>HeSoLuong;

15: cout<<"He so phu cap chu vu:";

16: cin>>HeSoPhuCap;

17: }

18:

19: void BienChe::TinhLuong()

20: {

21: Luong=MUC_CO_BAN*(1.0+HeSoLuong+HeSoPhuCap);

22: }

File CONTRACT.H

1: //CONTRACT.H

2: Định nghĩa lớp HopDong

3: #ifndef CONTRACT_H

4: #define CONTRACT_H

5:

6: #include "person.h"

7:

8: class HopDong : public Nguoi

9: {

10: protected:

11: float TienCong;

12: float NgayCong;

13: float HeSoVuotGio;

14: public:

15: HopDong();

16: virtual void TinhLuong();

17: virtual void Nhap();

18: };

19:

20: #endif

File CONTRACT.CPP:

1: //CONTRACT.CPP

2: Định nghĩa hàm thành viên cho lớp HopDong

3: #include "contract.h"

4:

5: HopDong::HopDong()

6: {

7: TienCong=NgayCong=HeSoVuotGio=0;

8: }

9:

10: void HopDong::Nhap()

11: {

12: Nguoi::Nhap();

13: cout<<"Tien cong:";

14: cin>>TienCong;

15: cout<<"Ngay cong:";

16: cin>>NgayCong;

17: cout<<"He so vuot gio:";

18: cin>>HeSoVuotGio;

19: }

20:

21: void HopDong::TinhLuong()

22: {

23: Luong=TienCong*NgayCong*(1+HeSoVuotGio);

24: }

File CT7_1.CPP:

1: //CT7_1.CPP

2: //Chương trình 7.1

3: #include<iostream.h>

4: #include<ctype.h>

5: #include "person.h"

6: #include "staff.h"

7: #include "contract.h"

8:

9: int main()

10: {

11: Nguoi *Ng[100];

12: int N=0;

13: char Chon,Loai;

14: do

15: {

16: cout<<"Bien che hay Hop dong (B/H)? ";

17: cin>>Loai;

18: Loai=toupper(Loai);

19: if (Loai=='B')

20: Ng[N]=new BienChe;

21: else

22: Ng[N]=new HopDong;

23: Ng[N++]->Nhap();

24: cout<<"Tiep tuc (C/K)? ";

25: cin>>Chon;

26: Chon=toupper(Chon);

27: if ((N==100)||(Chon=='K'))

28: break;

29: }

30: while (1);

31: for(int I=0;I<N;++I)

32: {

33: Ng[I]->TinhLuong();

34: Ng[I]->Xuat();

35: }

36: return 0;

37: }

Chúng ta chạy ví dụ 7.1 , kết quả ở hình 7.4

Hình 7.4: Kết quả của ví dụ 7.1