static void Main(string[] args)
        {
           // 2.定义一个一维数组，包括10个数，编写一个冒泡排序的函数；调动函数显示排序后的数组值
            int[] a = new int[10] { 5, 8, 7, 9, 6, 3, 4, 5, 10, 0 };
            sort(a);
        }
        protected   static  void sort(int [] a)
        {
            int i,j,t;
            for(j=0;j<a.Length;i++)
            {
                for (i = 0; i < 9 - j;i++ )
                {
                    if (a[i] > a[i + 1])
                    {
                        t = a[i]; a[i] = a[i + 1]; a[i + 1] = t;
                    }
                }
            }
            Console.WriteLine("排序后的数组：");
            for(i=0;i<a.Length;i++)
            {
                Console.Write("{0} ", a[i]);
            }
           Console .ReadLine ();
        }
    }

for(j=0;j<a.Length;i++)
应该是for(j=0;j<a.Length;j++)

谢谢，居然没发现

已经出来了，谢谢，下次我会再细心点的

static void Main(string[] args)
        {
           // 2.定义一个一维数组，包括10个数，编写一个冒泡排序的函数；调动函数显示排序后的数组值
            int[] a = new int[10] { 5, 8, 7, 9, 6, 3, 4, 5, 10, 0 };
            sort(a);
            sort1(a);
            Console.ReadLine();

        }
        public static void sort(int[] a)
        {
            Console.WriteLine("冒泡排序：");
            int i, j, t;
            for (j = 0; j < 10; j++)
            {
                for (i = 0; i < 9 - j; i++)
                {
                    if (a[i] > a[i + 1])
                    {
                        t = a[i]; a[i] = a[i + 1]; a[i + 1] = t;
                    }
                }
            }
            Console.WriteLine("排序后的数组：");
            for (i = 0; i < 10; i++)
            {
                Console.Write("{0} ", a[i]);
            }
            Console.ReadLine();
        }
        public static void sort1(int[] a)
        {
           Console.WriteLine("选择排序：");
           int i, j, k,t;
           for(i=0;i<10;i++)
           {
               k = i;//记录当前的数的下标，并默认该数最小
               for(j=1;j<10;j++)
               {
                  if(a[k]>a[j])//判断以后的数是否比a[k]小，记录其下标
                  {
                      k = j;
                  }
               }
               if (k != i)//判断最小的数的下标不是本轮序号最前的数的下标
               {
                   t = a[k];
                   a[k] = a[i];
                   a[i] = t;
               }
           }
           for (i = 0; i < 10; i++)
           {
               Console.Write("{0} ", a[i]);
           }
           Console.ReadLine();
       }
    }     
}
现在不可以调用sort1函数，这是为什么？
我把两个函数交换位置后，又可以执行sort1，但sort又不可以执行了

Console.ReadLine();
每个方法最后有都一个 Console.ReadLine();
一个执行完了，你按下回车，看能不能执行