例题：函数输出参数。理解函数的作用，函数是一个相对独立的代码块

class Program
    {
        public  int[] shuchucanshu(int[] shu,out int a,out int b) //基本格式，定义一个int数组
        {
            for (int i = 0; i < shu.Length ; i++) //冒泡排序
            {
                for (int j = i; j < shu.Length -1; j++)
                {
                    if (shu[i]<shu[j+1])
                    {
                        int zhong = 0;
                        zhong = shu[i];
                        shu[i] = shu[j + 1];
                        shu[j + 1] = zhong;
                    }
                }
            }
            a = shu[0]; //最大值
            b = shu[shu.Length - 1];//最小值。排序已经拍好，[shu.Length - 1]是最小数的下标
          
            return shu;
        }
        static void Main(string[] args)
        { 
            int a,b; //声明，与函数里的a,b没有任何关系，函数是独立的代码块
            int[] shu=new int[5]{1,3,5,9,6};
            new Program ().shuchucanshu (shu,out a,out b); //调用函数
            for (int i = 0; i < shu.Length ; i++)
            {
                Console.WriteLine(shu[i]);
            }
            Console.WriteLine("最大值是"+a+",最小值是"+b);
            Console.ReadLine();
        }