C#---委托--匿名函数--Lambda表达式--求任意数组的

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

namespace 求任意数组的最大值
{
class Program
{
//声明委托
public delegate int DelCompare(object o1, object o2);

    static void Main(string[] args)
    {
        //定义一个数组
        //object[] o = { 1, 2, 3, 4, 5, 6 };            
        object[] ostr = { "KobeBryant", "LeBronJames", "KyrieIrving", "KawhiLeonard" };

        //委托
        //object result = GetMax(o, CompareInt);
        //object result = GetMax(ostr, CompareStr);

        //匿名函数
        //object result = GetMax(ostr, delegate (object o1, object o2)
        //{
        //    //把传过来的两个Object对象转换成int类型
        //    string str1 = (string)o1;
        //    string str2 = (string)o2;
        //    //返回两字符串长度差值
        //    return str1.Length - str2.Length;
        //});

        //lamde表达式
        object result = GetMax(ostr, (object o1, object o2)=>
        {
            //把传过来的两个Object对象转换成int类型
            string str1 = (string)o1;
            string str2 = (string)o2;
            //返回两字符串长度差值
            return str1.Length - str2.Length;
        });

        Console.WriteLine("最长的数组是:{0}",result);
        Console.ReadKey();
        
    }
    //求int类型数组的最大值
    public static object GetMax(object[] nums,DelCompare del)
    {
        object max = nums[0];
        for (int i = 0; i < nums.Length; i++)
        {
            if (del(max, nums[i])<0)
            {
                max = nums[i];
            }
        }
        return max;
    }


    public static int CompareInt(object o1,object o2)
    {
        //把传过来的两个Object对象转换成int类型
        int num1 = (int)o1;
        int num2 = (int)o2;
        //返回两数差值
        return num1-num2;
    }
    //public static int CompareStr(object o1, object o2)
    //{
    //    //把传过来的两个Object对象转换成int类型
    //    string str1 = (string)o1;
    //    string str2 = (string)o2;
    //    //返回两字符串长度差值
    //    return str1.Length - str2.Length;
    //}       

   
}

}