6. 继承练习 需求：实现某公司各种岗位（经理、销售人员、普通员工）的员工薪水计算，输出不同岗位各一名员工的工资。 要求： 1) 定义员工类，具有计算薪水的方法 2) 定义子类：经理类、销售人员类、普通员工类，分别继承员工类，重写计算薪水的方法 3) 定义测试类，包含输出薪水的方法，参数为员工对象（父类的引用指向子类的对象）java代码

// 定义员工类
class Employee {
    private String name;
    private double baseSalary;

    public Employee(String name, double baseSalary) {
        this.name = name;
        this.baseSalary = baseSalary;
    }

    public String getName() {
        return name;
    }

    public double getBaseSalary() {
        return baseSalary;
    }

    public double calculateSalary() {
        return baseSalary;
    }
}

// 定义经理类，继承员工类
class Manager extends Employee {
    private double bonus;

    public Manager(String name, double baseSalary, double bonus) {
        super(name, baseSalary);
        this.bonus = bonus;
    }

    @Override
    public double calculateSalary() {
        return getBaseSalary() + bonus;
    }
}

// 定义销售人员类，继承员工类
class SalesPerson extends Employee {
    private double commission;

    public SalesPerson(String name, double baseSalary, double commission) {
        super(name, baseSalary);
        this.commission = commission;
    }

    @Override
    public double calculateSalary() {
        return getBaseSalary() + commission;
    }
}

// 定义普通员工类，继承员工类
class OrdinaryEmployee extends Employee {
    public OrdinaryEmployee(String name, double baseSalary) {
        super(name, baseSalary);
    }
}

// 定义测试类
class Test {
    public static void printSalary(Employee employee) {
        System.out.println("员工姓名：" + employee.getName());
        System.out.println("员工薪水：" + employee.calculateSalary());
    }

    public static void main(String[] args) {
        // 创建不同岗位的员工对象
        Manager manager = new Manager("经理A", 5000, 2000);
        SalesPerson salesPerson = new SalesPerson("销售人员B", 3000, 1000);
        OrdinaryEmployee ordinaryEmployee = new OrdinaryEmployee("普通员工C", 2000);
        
        // 输出员工薪水
        printSalary(manager);
        printSalary(salesPerson);
        printSalary(ordinaryEmployee);
    }
}

运行结果：

员工姓名：经理A
员工薪水：7000.0
员工姓名：销售人员B
员工薪水：4000.0
员工姓名：普通员工C
员工薪水：2000.0

以上是一个简单的实现，根据不同岗位的员工类进行薪水计算，并通过测试类进行输出。