功能的实现答案

【问题标题】：Realising of the function功能的实现
【发布时间】：2022-01-18 00:46:54
【问题描述】：

谁能告诉我，如何在主体中实现我的功能？所有作品，但我想做一个雇主目录，那么如何写雇员名单或海量？

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];
    }
}

【问题讨论】：

标签： c# visual-studio

【解决方案1】：

我认为您没有使用正确的逻辑设置继承层次结构。基类Employee 是可扩展的并且包含基方法：

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在基类的属性中添加新的方法和属性来扩展：

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;
    }
}

要测试这两个类的工作原理，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());
    }
}

【讨论】：

非常感谢，您的回答解决的问题比我问的要多:)

【解决方案2】：

如果您想将员工添加到目录中，您可以使用“添加”功能将员工添加到目录中：

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。但是“目录”不是“员工”的类型

【讨论】：

谢谢！祝你好运\