#include <iostream>

#include<iostream>
using namespace std;


class Employee
{
public:
 virtual void raiseSalary()
 {
 cout<<0<<endl;
 }

 virtual void promote()
 { /* common promote code */ }
};

class Manager: public Employee
{
 void raiseSalary() override
 {
 cout<<100<<endl;
 }

 void promote() override
 { /* Manager specific promote */ }
};

class Engineer: public Employee
{
 void raiseSalary() override
 {
 cout<<200<<endl;
 }

 void promote() override
 { /* Manager specific promote */ }
};


void globalRaiseSalary(Employee *emp[], int n)
{
 for (int i = 0; i < n; i++)
 emp[i]->raiseSalary();
 // according to the actual object, not according to the type of pointer
}

int main()
{
 // 虚函数的调用取决于指向或者引用的对象的类型,而不是指针或者引用自身的类型
 Employee *emp[] = {new Manager(), new Engineer};
 globalRaiseSalary(emp,2); // 100 200
 return 0;
}