C#迭代器C#基础学习

港控/mmm° 2022-01-06 16:13 282阅读 0赞

1 using System;
     2 using System.Collections.Generic;
     3 using System.Linq;
     4 using System.Text;
     5 using System.Threading.Tasks;
     6 
     7 using System.Collections;
     8 
     9 namespace day01
    10 {
    11     class Class28
    12     {
    13         static void Main(string[] args)
    14         {
    15             foreach(string temp in SimpleList())
    16             {
    17                 Console.WriteLine(temp);
    18             }
    19             Console.ReadKey();
    20         }
    21         static IEnumerable SimpleList()
    22         {
    23             yield return "string 1";
    24             yield return "string 2";
    25             yield return "string 3";
    26         }
    27     }
    28 }
    代码二

1 using System;
     2 using System.Collections.Generic;
     3 using System.Linq;
     4 using System.Text;
     5 using System.Threading.Tasks;
     6 
     7 using System.Collections;
     8 
     9 namespace day01
    10 {
    11     class Class29
    12     {
    13         static void Main(string[] args)
    14         {
    15             Cat catDictionary = new Cat();
    16             catDictionary.Add("1001", new Cat("zhangsan"));
    17             catDictionary.Add("1002", new Cat("lisi"));
    18             catDictionary.Add("1031", new Cat("wangwu"));
    19 
    20             foreach(Animal temp in catDictionary)
    21             {
    22                 Console.WriteLine("{0} {1}", temp.ToString(), temp.Name);
    23             }
    24             Console.ReadKey();
    25         }
    26     }
    27     public abstract class Animal : DictionaryBase
    28     {
    29         protected string name;
    30         public string Name { get; set; }
    31         public Animal()
    32         {
    33             Name = "default";
    34         }
    35         public Animal(string name)
    36         {
    37             Name = name;
    38         }
    39         public abstract void Run();
    40         public abstract void Sleep();
    41         public override string ToString()
    42         {
    43             return "name: " + Name;
    44         }
    45         public void Add(string newId, Animal animal)
    46         {
    47             Dictionary.Add(newId, animal);
    48         }
    49         public void Remove(string newId)
    50         {
    51             Dictionary.Remove(newId);
    52         }
    53         public Animal this[string newId]
    54         {
    55             get
    56             {
    57                 return (Animal)Dictionary[newId];
    58             }
    59             set
    60             {
    61                 Dictionary[newId] = value;
    62             }
    63         }
    64         //添加迭代器
    65         public new IEnumerator GetEnumerator()
    66         {
    67             foreach(object temp in Dictionary.Values)
    68             {
    69                 yield return (Animal)temp;
    70             }
    71         }
    72     }
    73     public class Cat : Animal
    74     {
    75         //这个构造器该怎么理解？
    76         public Cat()
    77         {
    78 
    79         }
    80         public Cat(string name) : base(name)
    81         {
    82 
    83         }
    84         public override void Run()
    85         {
    86             Console.WriteLine("animal name: {0} is running", Name);
    87         }
    88 
    89         public override void Sleep()
    90         {
    91             Console.WriteLine("animal name: {0} is sleeping", Name);
    92         }
    93     }
    94 }

转载于:https://www.cnblogs.com/littlelittleprince/p/10671618.html