4. 다형성

Employee 하위 클래스로, PermanentWorker, TemporaryWorker, 등을 생성해

EmployeeHandler로 관리를 해봄.

- 열혈C++ 속의 문제라고 하는데, 구현을 해봄.

다형성, 상속, virtual function 모두 사용.

#include <iostream>
#include <cstring>
 
using namespace std;
 
class Employee {
  protected :
    char name[100];
  public :
    Employee(char* name) {
      strcpy(this->name, name);
    }
    virtual void ShowYourName() const { }
    virtual void ShowSalaryInfo() const { }
};
 
class PermanentWorker : public Employee {
  private :
    int salary;
  public :
    PermanentWorker(char* name, int money) : Employee(name), salary(money) { }
    int GetPay() const { return salary; }
    void ShowYourName() const { cout << name << "\t" << this->GetPay() << endl; }
    void ShowSalaryInfo() const {
      ShowYourName();
    }
};
 
class TemporaryWorker : public Employee {
  private:
    int workTime;
    int payPerHour;
  public :
    TemporaryWorker(char* name, int pay) : Employee(name), workTime(0), payPerHour(pay) { }
    void AddWorkTime(int time) {
      workTime += time;
    }
    int GetPay() const {
      return workTime*payPerHour;
    }
    void ShowSalaryInfo() const {
      ShowYourName();
    }
};
 
class SalesWorker : public PermanentWorker{
  private :
    int salesResult;
    double bonusRatio;
  public :
    SalesWorker(char* name, int money, double ratio) : PermanentWorker(name, money), bonusRatio(ratio), salesResult(0) { }
    void ShowYourName() const { 
      cout << name << "\t" <<this->PermanentWorker::GetPay() << "\t" << bonusRatio << endl;
    }
    int GetPay() const{
        return PermanentWorker::GetPay() + (int)(salesResult*bonusRatio); 
    }
    
    void ShowSalaryInfo() const {
      ShowYourName(); GetPay();
    }
    void AddSalesResult(int value) {
      salesResult+=value;
    }
};
 
class EmployeeHandler {
  private :
    Employee* empList[50];
    int empNum;
  public :
    EmployeeHandler() : empNum(0) { }
    void AddEmployee(Employee* emp) {
      empList[empNum++] = emp;
      
    }
    void ShowSalaryInfo() {
      for(int i=0; i<empNum; ++i) 
        empList[i]->ShowYourName();
    }
    
    void ShowTotalSalary() const{
      
    }
};
 
int main(int argc, char* argv[]) {
  EmployeeHandler eh;
  eh.AddEmployee(new SalesWorker("qerogram", 1000, 0.5));
  eh.AddEmployee(new PermanentWorker("qerogram2", 3000));
  eh.ShowSalaryInfo();
  return 0;
}

* 결과

qerogram	1000	0.5
qerogram2	3000