实现功能

Question

有人能告诉我，如何在主体中实现我的功能吗？所有的工作，但我想做一个目录的雇主，那么如何写雇主列表或大量？

class Catalog : Employe
{
Employe[] employes = new Employe[10];
Employe p1 = new Employe(14, "Mark", "James", 124151, "Coder", 4000);
public Catalog(int _age, string _firstName, string _lastName, int _id, string _job, int _salary) : base(_age, _firstName, _lastName, _id, _job, _salary)
{
employes[1] = p1;
}
public void CatalogLog()
{
for(int i = 0; i < employes.Length; i++)
Console.WriteLine(employes[i]);
} 
}
class TestInheritence
{
public static void Main(string[] args)
{
Employe[] employes = new Employe[10];
}
}

Answer 1

我认为您没有用正确的逻辑设置继承层次结构。基类Employee是可扩展的，包含基本方法：

public class Employee
{
private int _id;
private string _firstName; 

public Employee(int id, string firstName)
{
_id = id;
_firstName = firstName;
}

public int GetID()
{
return _id;
}

public void SetID(int id)
{
if(id > 0)
_id = id;
}   

public void Print()
{
Console.WriteLine("ID: {0}tFirst Name: {1}", this._id, this._firstName);
}
}

派生类允许对象通过向基类的属性添加新方法和属性来扩展：

public class Manager : Employee 
{
private string _city;

public Manager(int id, string firstName, string city) : base(id, firstName)
{
_city = city;
}

public string GetCity()
{
return _city;
}
}

为了测试这两个类是如何工作的，您可以查看下面的应用程序代码：

public class Program
{
public static void Main()
{           
Employee[] employees = new[]
{
new Employee(1, "Thomas"),
new Employee(2, "John"),
new Employee(3, "Erick"),
new Employee(4, "Ahmet"),
new Employee(5, "Sun")
};

employees[0].Print();

Manager manager = new Manager(6, "Johnson", "London");
manager.Print();
Console.WriteLine("City: {0}", manager.GetCity());
}
}

Answer 2

如果你想将员工添加到目录中，你可以有一个"添加"功能，将员工添加至目录：

class Catalog : Employe
{
List<Employe> employes = new List<Employe>();

public void AddEmployee(int _age, string _firstName, string _lastName, int _id, string _job, int _salary) : base(_age, _firstName, _lastName, _id, _job, _salary)
{
Employe p1 = new Employe(_age, _firstName, _lastName, _id, _job, _salary);
employes.Add(p1);
}
public void CatalogLog()
{
for(int i = 0; i < employes.Count(); i++)
Console.WriteLine(employes[i]);
} 
}
class TestInheritence
{
public static void Main(string[] args)
{
Catalog catalog = new Catalog();
catalog.AddEmployee(14, "Mark", "James", 124151, "Coder", 4000);
// Add more employees.

}

}

但我认为这是一个错误的继承用例。通常，当类型之间存在"is-a"关系时，您希望继承。但"目录"不是"员工"的类型