利用抽象類別及多型觀念建立薪資計算系統

#員工及薪資計算請看投影片

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#include <string>

#include <vector>

#include <iostream>

using namespace std;

/*Employee abstract base class.*/

class Employee

{

    public:

        Employee( const string & );

        void setName( const string & );

        string getName() const;

                //your code...

    private:   

        string Name;   

};

Employee::Employee( const string & name ): Name(name)

{}

void Employee::setName( const string &name )

{

    Name = name;

}

string Employee::getName() const

{

    return Name;

}

void Employee::print() const

{

    cout << getName();

}

/*SalariedEmployee class derived from Employee.*/

class SalariedEmployee : public Employee

{

    public:

        SalariedEmployee( const string &, double = 0.0 );

        void setWeeklySalary( double );

        double getWeeklySalary() const;

        //your code...

    private:   

        double weeklySalary;   

};

/*CommissionEmployee class derived from Employee.*/

class CommissionEmployee : public Employee

{

    public:

        CommissionEmployee(const string&, double = 0.0, double = 0.0);

        void setGrossSales( double );

        double getGrossSales() const;

        void setCommissionRate( double );

        double getCommissionRate() const;

        //your code...

    private:       

        double grossSales;

        double commissionRate;

};

/*BasePlusCommissionEmployee class derived from CommissionEmployee.*/

class BasePlusCommissionEmployee : public CommissionEmployee

{

    public:

        BasePlusCommissionEmployee(const string&, double = 0.0, double = 0.0, double = 0.0 );

        void setBaseSalary( double );

        double getBaseSalary() const;

        //your code...

    private:       

        double baseSalary;

};

void virtualViaPointer( const Employee * const);

int main()

{

        string name1,name2,name3;

        double salary, sales, rate, basesales, baserate, basesalary;

        while( cin >> name1 >> salary    >>

                              name2 >> sales     >> rate     >>

                              name3 >> basesales >> baserate >> basesalary)

        {

                SalariedEmployee salariedEmployee(name1,salary);

                CommissionEmployee commissionEmployee(name2,sales,rate);

                BasePlusCommissionEmployee basePlusCommissionEmployee(name3,basesales,baserate,basesalary);

                vector < Employee* > employee(3);

                employee[0] = &salariedEmployee;

                employee[1] = &commissionEmployee;

                employee[2] = &basePlusCommissionEmployee;

                for( size_t i = 0; i < employee.size(); i++ )

                        virtualViaPointer( employee[i] );

        }      

}

void virtualViaPointer( const Employee * const baseClassPtr )

{

      baseClassPtr->print();

    cout << "\nearned $" << baseClassPtr->earning() << "\n\n";

}