字典的案例和封装

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _03_字典的封装
{
    internal class Program
    {
        static void Main(string[] args)
        {
            MyDic myDic = new MyDic();
            myDic.Add("name", 123);
            myDic.Add("age", 10);
            myDic.Add("gender", 1);
            myDic.Add("height", 170);
            myDic.Add("weight", 60);
            myDic.Remove ("name");
          List<string> keys = myDic.Keys;
            for (int i = 0; i < keys.Count; i++)
            {
                Console.WriteLine(keys[i]);
            }

            Console.WriteLine(myDic.Count );
            Console.WriteLine(myDic["name"]);
            Console.ReadLine();
        }
    }
    // 自己封装的字典类
    class MyDic
    {
       string[] keys = new string[4];// 存储所有的键
        int[] values = new int[4];// 存储所有的值

        // 定义属性获取字典中的数据长度
        public int Count { get; private set; } = 0;
        public List<string> Keys
        {
            get
            {
                List<string> keys = new List<string>();
                for (int i = 0; i < Count; i++)
                {
                    keys.Add(this.keys[i]);

                }
                return keys;
            }
        }
        public List<int>  Values
        {
            get
            {
                List<int>  values = new List<int>();
                for (int i = 0; i < Count; i++)
                {
                    values.Add(this.values[i]);
                }
                return values;

            }
        }

        public void Add(string key, object value)
        {
            UpdateCapacity(Count + 1);
           // 将添加的数据放到数组的最后一位
            keys[Count] = key;
            values[Count] = (int)value;
            Count++;
        }
        public int this[string key]
        {
            get
            {
                int index = IndexOf(key);
                if (index == -1)
                {
                    // default(int) 获取指定的类型的默认值
                    return default(int);
                }
                return values[index];
            }
            set
            {
                int index = IndexOf(key);
                if (index != -1)
                {
                    values[index] = value;
                }
            }

            
        }
        int IndexOf(string key)
        {
            for (int i = 0; i < Count; i++)
            {
                if (keys[i] == key)
                {
                    return i;
                }
            }
            return -1;
        }
        // 获取存储数据的空间大小应该是多大
        // 获取数据的长度
        // 更新存储数据的容量
        public void UpdateCapacity(int lenth)
        {
            int capa = GetCapacity(lenth);
            if ( capa != keys.Length )
            {
                // 将键对应的空间大小改变一下
                string[] newKeys = new string[capa];
                for (int i = 0; i < Count ; i++)
                {
                    newKeys[i] = keys[i];
                }
                keys = newKeys;

                // 将值对应的空间大小改变一下
                int[] newValues = new int[capa];
                for (int i = 0; i < Count ; i++)
                {
                    newValues[i] = values[i];
                }
                values = newValues;

            }
        }
        public int GetCapacity(int lenth)
        {
            // 定义变量存储开始的空间大小
            int Capacity = 4;
           while (Capacity < lenth)
            {
                Capacity *= 2;
            }
            return Capacity;
        }

        public void Remove(string key)
        {
            int index = IndexOf(key);
            if (index != -1)
            {
               
                for (int i = index; i < Count-1 ; i++)
                {
                    keys[i] = keys[i + 1];
                    values[i] = values[i + 1];
                }
               
                Count--;
            }
        }
       


        
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _02_学生字典案例
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string,string>student = new Dictionary<string, string>();
            student.Add("name", "张三");
            student.Add("age", "20");
            student.Add("score", "80");
            Dictionary<string, string> student1 = new Dictionary<string, string>();
            student1.Add("name", "李四");
            student1.Add("age", "18");
            student1.Add("score", "80");
            Dictionary<string, string> student2 = new Dictionary<string, string>();
            student2.Add("name", "王五");
            student2.Add("age", "20");
            student2.Add("score", "90");

        }
    }
}