使用简化的类层次结构来表示公司目前和以前的雇员状况 c++

以下是使用简化的类层次结构来表示公司目前和以前的雇员状况的 c++ 代码示例：

#include <iostream>
using namespace std;

class Employee {
protected:
    string name;
    int age;
    double salary;
public:
    Employee(string n, int a, double s) : name(n), age(a), salary(s) {}
    virtual void display() {
        cout << "Name: " << name << endl;
        cout << "Age: " << age << endl;
        cout << "Salary: " << salary << endl;
    }
};

class CurrentEmployee : public Employee {
private:
    string department;
public:
    CurrentEmployee(string n, int a, double s, string d) : Employee(n, a, s), department(d) {}
    void display() {
        Employee::display();
        cout << "Department: " << department << endl;
    }
};

class FormerEmployee : public Employee {
private:
    string reasonForLeaving;
public:
    FormerEmployee(string n, int a, double s, string r) : Employee(n, a, s), reasonForLeaving(r) {}
    void display() {
        Employee::display();
        cout << "Reason for leaving: " << reasonForLeaving << endl;
    }
};

int main() {
    Employee* e1 = new CurrentEmployee("John", 30, 5000, "Sales");
    Employee* e2 = new FormerEmployee("Jane", 25, 4000, "Moved to another city");

    e1->display();
    cout << endl;
    e2->display();

    delete e1;
    delete e2;

    return 0;
}

在这个例子中，我们有三个类：`Employee`，`CurrentEmployee`和`FormerEmployee`。`Employee`类是一个基类，它有一些共同的属性，如姓名、年龄和薪水，并且有一个虚函数`display()`来显示这些属性。`CurrentEmployee`和`FormerEmployee`都是从`Employee`类派生出来的类，它们分别表示当前雇员和以前的雇员，并具有特定于每个类型的属性。这些类都有一个`display()`函数来覆盖`Employee`类中的虚函数，以便添加新的属性并显示它们。在主函数中，我们创建了两个指向不同类型雇员对象的指针，并调用它们的`display()`函数来显示它们的属性。最后，我们释放了内存以避免内存泄漏。