/// <summary>
/// 委托让排序代码更加优雅(易扩展，易维护)
/// 本文包含知识点：
/// 1.委托定义
/// 2.委托的好处
/// 3.Lamda(包括语句Lamda和表达式Lambda)
/// 4.Lambda和委托的关系
/// </summary>
    class Program
    {
//定义内嵌委托(委托本质是一个类；编译器默认为继承自System.Delegate)
        public delegate bool ComparerionHandler(int first, int second);

static void Main(string[] args)
        {

int[] beforeSortList = new int[3] { 1, 3, 2 };

            Console.WriteLine(string.Join(",", beforeSortList.ToArray()));

///实名委托传递参数
            //int[] afterSortList = BubbleSort(beforeSortList, Asb);

　　　　　　//int[] afterSortList = BubbleSort(beforeSortList, Desc);

            ///匿名方法传递参数
            //int[] afterSortList = BubbleSort(beforeSortList, delegate(int first, int second) { return first > second; });

 　　　　　 //int[] afterSortList = BubbleSort(beforeSortList, delegate(int first, int second) { return first < second; });

///语句Lambda传递参数(Lambda是匿名方法的简化语法)
            int[] afterSortList = BubbleSort(beforeSortList, (first, second)=>{ return first > second; });

            Console.WriteLine(string.Join(",", afterSortList.ToArray()));


        }

　　　　——————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————

　　　　 //利用委托达到-->对扩展是开放的
//升序
//public static bool Asb(int first, int second)
//{
//    return first > second;
//}

//降序
        public static bool Desc(int first, int second)
        {
return first < second;
        }

//字母排序

//可扩展的其他排序……

　　　　 ——————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————

　　　　 //冒泡排序

　　　　 //利用委托达到-->对修改是封闭的
public static int[] BubbleSort(int[] list, ComparerionHandler compareion)
        {
int temp;

for (int i = list.Length - 1; i >= 0; i--)
            {
for (int j = 1; j <= i; j++)
                {
if (compareion(list[j - 1], list[j]))
                    {
                        temp = list[j];
                        list[j] = list[j - 1];
                        list[j - 1] = temp;
                    }
                }
            }
return list;
        }

    }