Vehicle友元Date多态Sedan和Truck

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main.cpp
  1. #include <iostream>
  2. #include "Vehicle.h"
  3. #include "Sedan.h"
  4. #include "Truck.h"
  6. using namespace std;
  8. int main()
  9. {
  10.     Vehicle vehicle("Generic", 100, "Gray", Date(2005, 6, 6));
  11.     Sedan sedan1("Toyota", 200, "Red", Date(2020, 1, 15), 5, 4);
  12.     Sedan sedan2("Honda", 201, "Blue", Date(2021, 5, 20), 4, 6);
  13.     Truck truck1("Ford", 300, "Black", Date(2019, 10, 5), 18, 40.0);
  14.     Truck truck2("Chevy", 301, "Silver", Date(2022, 3, 10), 20, 50.0);
  16.     Vehicle* vehicles[] = {&vehicle, &sedan1, &sedan2, &truck1, &truck2};
  18.     for (const auto& vehiclePtr : vehicles)
  19.     {
  20.         vehiclePtr->print();
  21.     }
  23.     return 0;
  24. }
复制代码
Date.h
  1. #ifndef DATE_H
  3. #define DATE_H
  4. #include <iostream>
  6. using namespace std;
  8. class Date
  9. {
  10.     friend class Vehicle;
  11. public:
  12.     Date();
  13.     Date(int y, int m, int d);
  14.     ~Date();
  16.     void setYear(int y);
  17.     void setMonth(int m);
  18.     void setDay(int d);
  20.     int getYear();
  21.     int getMonth();
  22.     int getDay();
  24.     void print();
  25. private:
  26.     int Year;
  27.     int Month;
  28.     int Day;
  30. };
  31. #endif // DATE_H
复制代码
 Date.cpp
  1. #include "Date.h"
  2. #include <iostream>
  3. using namespace std;
  5. Date::Date()
  6. {
  7.     Year = 0;
  8.     Month = 0;
  9.     Day = 0;
  10. }
  12. Date::Date(int year, int month, int day)
  13. {
  14.     setYear(year);
  15.     setMonth(month);
  16.     setDay(day);
  17. }
  19. Date::~Date()
  20. {
  21.     //cout << "object Destructor is called" << endl;
  22. }
  25. void Date::setYear(int year)
  26. {
  27.     Year = year;
  28. }
  30. void Date::setMonth(int month)
  31. {
  32.     Month = month;
  33. }
  35. void Date::setDay(int day)
  36. {
  37.     Day = day;
  38. }
  40. int Date::getYear()
  41. {
  42.     return Year;
  43. }
  45. int Date::getMonth()
  46. {
  47.     return Month;
  48. }
  50. int Date::getDay()
  51. {
  52.     return Day;
  53. }
  55. void Date::print()
  56. {
  57.     cout << endl;
  58.     cout << "Year :" << getYear() << endl;
  59.     cout << "Month :" << getMonth() << endl;
  60.     cout << "Day :" << getDay() << endl;
  61. }
复制代码
Sedan.h
  1. #ifndef SEDAN_H
  3. #define SEDAN_H
  4. #include <iostream>
  6. #include "Vehicle.h"
  7. using namespace std;
  9. class Sedan :public Vehicle
  10. {
  11. public:
  12.     Sedan();
  13.     Sedan(string brand, int model, string color, Date MFD, int NOP, int NOA);
  14.     ~Sedan();
  16.     void setNumberOfPassenger(int P);
  17.     int getNumberOfPassenger();
  19.     void setNumberOfAirbag(int A);
  20.     int getNumberOfAirbag();
  22.     void print();
  23. private:
  24.     int NumberOfPassenger;
  25.     int NumberOfAirbag;
  26. };
  27. #endif // SEDAN_H
复制代码
Sedan.cpp
  1. #include "Sedan.h"
  2. #include <iostream>
  4. using namespace std;
  6. Sedan::Sedan()
  7. {
  8.     NumberOfPassenger = 0;
  9.     NumberOfAirbag = 0;
  10. }
  12. Sedan::Sedan(string brand, int model, string color, Date MFD, int NOP, int NOA)
  13. {
  14.     setBrand(brand);
  15.     setModel(model);
  16.     setColor(color);
  17.     setManufactureDate(MFD);
  18.     setNumberOfPassenger(NOP);
  19.     setNumberOfAirbag(NOA);
  20. }
  22. Sedan::~Sedan()
  23. {
  25. }
  27. void Sedan::setNumberOfPassenger(int P)
  28. {
  29.     NumberOfPassenger = P;
  30. }
  32. int Sedan::getNumberOfPassenger()
  33. {
  34.     return NumberOfPassenger;
  35. }
  37. void Sedan::setNumberOfAirbag(int A)
  38. {
  39.     NumberOfAirbag = A;
  40. }
  42. int Sedan::getNumberOfAirbag()
  43. {
  44.     return NumberOfAirbag;
  45. }
  47. void Sedan::print()
  48. {
  49.     Vehicle::print();
  50.     cout << "Number of Passengers: " << NumberOfPassenger << ", Number of Airbags: " << NumberOfAirbag << endl;
  51. }
复制代码
Truck.h
  1. #ifndef TRUCK_H
  2. #define TRUCK_H
  4. #include "Vehicle.h"
  6. using namespace std;
  8. class Truck : public Vehicle
  9. {
  10. public:
  11.     Truck();
  12.     Truck(string brand, int model, string color, Date MFD, int NOW, double TC);
  13.     ~Truck();
  15.     void setNumberOfWheel(int NOW);
  16.     int getNumberOfWheel();
  18.     void setTowingCapacity(double TC);
  19.     double getTowingCapacity();
  21.     void print();
  22. private:
  23.     int NumberOfWheel;
  24.     double TowingCapacity;
  25. };
  27. #endif // TRUCK_H
复制代码
Truck.cpp
  1. #include "Truck.h"
  2. #include <iostream>
  4. using namespace std;
  6. Truck::Truck()
  7. {
  8.     NumberOfWheel = 0;
  9.     TowingCapacity = 0;
  10. }
  11. Truck::Truck(string brand, int model, string color, Date MFD, int NOW, double TC)
  12. {
  13.     setBrand(brand);
  14.     setModel(model);
  15.     setColor(color);
  16.     setManufactureDate(MFD);
  17.     setNumberOfWheel(NOW);
  18.     setTowingCapacity(TC);
  19. }
  21. Truck::~Truck()
  22. {
  24. }
  26. void Truck::setNumberOfWheel(int NOW)
  27. {
  28.     NumberOfWheel = NOW;
  29. }
  31. int Truck::getNumberOfWheel()
  32. {
  33.     return NumberOfWheel;
  34. }
  36. void Truck::setTowingCapacity(double TC)
  37. {
  38.     TowingCapacity = TC;
  39. }
  41. double Truck::getTowingCapacity()
  42. {
  43.     return TowingCapacity;
  44. }
  46. void Truck::print()
  47. {
  48.     Vehicle::print();
  49.     cout << "Number of Wheels: " << NumberOfWheel << ", Towing Capacity: " << TowingCapacity << " tons" << endl;
  50. }
复制代码
Vehicle.h
  1. #ifndef VEHICLE_H
  3. #define VEHICLE_H
  5. #include <iostream>
  6. #include "Date.h"
  7. using namespace std;
  9. class Vehicle
  10. {
  11. public:
  12.     Vehicle();
  13.     Vehicle(string brand, int model, string color, Date MFD);
  14.     ~Vehicle();
  15.     void setBrand(string brand);
  16.     string getBrand();
  17.     void setModel(int id);
  18.     int getModel();
  19.     void setColor(string color);
  20.     string getColor();
  21.     void setManufactureDate(Date d);
  22.     Date getManufactureDate();
  23.     virtual void print();
  24. private:
  25.     string Brand;
  26.     int Model;
  27.     string Color;
  28.     Date ManufactureDate;
  29. };
  30. #endif // VEHICLE_H
复制代码
Vehicle.cpp
  1. #include "Vehicle.h"
  2. #include <iostream>
  4. using namespace std;
  6. Vehicle::Vehicle()
  7. {
  8.     Brand = "XXX";
  9.     Model = 10086;
  10.     Color = "Black";
  11. }
  13. Vehicle::Vehicle(string brand, int model, string color, Date MFD)
  14. {
  15.     setBrand(brand);
  16.     setModel(model);
  17.     setColor(color);
  18.     setManufactureDate(MFD);
  19. }
  21. Vehicle::~Vehicle()
  22. {
  24. }
  26. void Vehicle::setBrand(string brand)
  27. {
  28.     Brand = brand;
  29. }
  31. string Vehicle::getBrand()
  32. {
  33.     return Brand;
  34. }
  36. void Vehicle::setModel(int id)
  37. {
  38.     Model = id;
  39. }
  41. int Vehicle::getModel()
  42. {
  43.     return Model;
  44. }
  46. void Vehicle::setColor(string color)
  47. {
  48.     Color = color;
  49. }
  51. string Vehicle::getColor()
  52. {
  53.     return Color;
  54. }
  56. void Vehicle::setManufactureDate(Date d)
  57. {
  58.     ManufactureDate = d;
  59. }
  61. Date Vehicle::getManufactureDate()
  62. {
  63.     return ManufactureDate;
  64. }
  66. void Vehicle::print()
  67. {
  68.     cout << "Brand: " << Brand << ", Model: " << Model << ", Color: " << Color << ", ManufactureDate: ";
  69.     ManufactureDate.print();
  70.     cout << endl;
  71. }
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Result:


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