2021-7-27 泛型基本练习

using System;
using System.Collections.Generic;
namespace 泛型的基本使用练习
{
    class Program
    {
        static void Main(string[] args)
        {
           //泛型练习1
            var a = "aa";var b = "bb";
            GetSwap(ref a, ref b);
            Console.WriteLine(a);
            Console.WriteLine(b);
            var aa = 2; var bb =3;
            GetSwap(ref aa, ref bb);
            Console.WriteLine(aa.ToString());
            Console.WriteLine(bb.ToString());

            //泛型练习2
            newGeneric<string> program = new newGeneric<string>(5);
            for (int i = 0; i < 5; i++)
            {
                program.SetItem(i, "ss" + i);
            }
            for (int i = 0; i < 5; i++)
            {
                Console.WriteLine(program.GetItem(i));
            }
          
            Console.ReadKey();
        }
        public static void GetSwap<T>(ref T first,ref T second)//方法中使用泛型要加在方法名后面
        {
            var a = first;
            first = second;
            second = a;
        }
      
    }
    class newGeneric<S>//此处注意要添加泛型<S>才可以使用
    {
        S[] array;
        public newGeneric(int index)
        {
            array = new S[index + 1];//在构造函数中定义泛型数组的长度
        }
        public S GetItem(int a)//这里的S是返回值
        {
            return array[a];
        }
        public void SetItem(int a, S value)
        {
            array[a] = value;
        }
    }
}

代码奉上