练习定义抽象类，基类，派生的一道题

[zhywylb]

定义一个抽象类Pet（宠物）类，作为基类，类中定义两个私有字段毛色和年龄。定义抽象方法完成宠物的自我介绍功能：定义两个派生类Cath和Dog，再覆写基类抽象方法；定义包含主方法的类MainClass；通过丑行类对象调用派生类的覆写方法。

[ohkuy]

这种题照着课本做就是了！

[娃都会打酱油了]

abstract class Pet
{
   private string _color;
   private int _age;

   public abstract string Desc();
}

class Cat:Pet
{
    public override string Desc()
    {
       //代码
    }
}

class MainClass
{
   Pet _pet;

   public MainClass()
   {
      _pet = new Cat();
   }

   public void GetPetDesc()
   {
      Console.WriteLine(_pet.Desc());
   }
}

[种草德鲁伊]

不懂，帮顶。

[remember_me]

public abstract class Pet
{
  private string color;
  private int age;

  public abstract void say();
}

public class Dog : Pet
{
  public override void say()
  {
     Console.Write("I am a dog");
  }
}

public class Cat : Pet
{
   public override void say()
   {
      Console.Write("I am the cat");  
   }
}

public class MainClass
{
   static void Main()
   {
       Cat cat = new Cat();
       cat.say();
       Dog dog = new Dog();
       dog.say();
   }
}

[kingdom_0]

[Quote=引用 3 楼 karascanvas 的回复:]

不懂，帮顶。
[/Quote]额……

[kingdom_0]

迥..

[快乐大法师]

不好意思 代码借用下

public abstract class Pet
{
public string color;
public int age;
public Pet(string color, int age)
{
this.color = color;
this.age = age;
}
public abstract void say();
}

public class Dog : Pet
{
public Dog(string color, int age)
: base(color, age)
{
}
public override void say()
{
//Console.Write("I am a dog "+base.color+age.ToString());
MessageBox.Show("I am a dog " + base.color + age.ToString());
}
}

public class Cat : Pet
{
public Cat(string color, int age)
: base(color, age)
{
}
public override void say()
{
//Console.Write("I am the cat" + base.color + age.ToString());
MessageBox.Show("I am the cat" + base.color + age.ToString());
}
}


public class MainClass
{
static void Main()
{
List<Pet> list = new List<Pet>();
list.Add(new Cat("绿色", 5));
list.Add(new Dog("蓝色", 3));

for (int i = 0; i < list.Count; i++)
{
list[i].say();
}


}
}

[雪饮]

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication2
{
public abstract class Pet
{
public static string Color;
public static int Age;
public abstract void Say();
}

public class Dog : Pet
{
public override void Say()
{
Console.WriteLine("I am a dog");
}
}

public class Cat : Pet
{
public override void Say()
{
Console.WriteLine("I am a cat");
}
}

class Program
{
static void Main(string[] args)
{
#region ""
//while (true)
//{
// Console.WriteLine("请输入菱形的长：");
// int a = int.Parse(Console.ReadLine());
// for (int i = 0; i < a; i++)
// {
// for (int j = a - i - 1; j >= 0; j--)
// {
// Console.Write(" ");
// if (j == 0)
// {
// for (int k = 0; k < i + 1; k++)
// {
// Console.Write("* ");

// }
// Console.WriteLine();
// }
// }

// }
// for (int i = 0; i < a-1; i++)
// {
// for (int j = 0; j <= i+1; j++)
// {
// Console.Write(" ");
// if (j == i+1)
// {
// for (int k = 0; k < a-i-1; k++)
// {
// Console.Write("* ");

// }
// Console.WriteLine();
// }
// }
// }
//}
#endregion
Pet p = new Cat();
p.Say();

Pet p1 = new Dog ();
p1.Say();
}
}
}

[remember_me]

七楼的代码不符合规则，楼主说的是宠物类中定义的是两个私有的字段！