我是冒泡排序的  多少数字都可以按从小到大排   改相应的值就可以了
    static void Main(string[] args)
        {
           int[] number = new int[3];
           int i, j;
           int temp;
           for (i = 0; i < 3; i++)
           {
               Console.WriteLine("请输入第{0}个数字", i + 1);

               number[i] = int.Parse(Console.ReadLine());
           }
               for (i = 0; i < number.Length - 1; i++)
               {
                   for (j = 0; j < number.Length - 1 - i; j++)
                   {
                       if (number[j] > number[j + 1])
                       {
                           temp = number[j];
                           number[j] = number[j + 1];
                           number[j + 1] = temp;
                       }
                   }
               }
           
           Console.WriteLine("从小到大排序后：");
           for (i = 0; i < number.Length; i++)
           {
               Console.Write("{0 }\t", number[i]);
           }
           Console.ReadLine();
        }

main()
{
    int a,b,c,n;
    printf("输入三个数:");
    scanf("%d %d %d",&a,&b,&c);
    if(a>b)
    {n=a;a=b;b=n;
     if(b>c)
       { n=b;b=c;c=n;
       if  (a>c)
       {n=a;a=c;c=n;
       }
       }
       }
    printf("%d,%d,%d\n",a,b,c);
}
//先看一段简单的代码：输入3个数，然后按从小到大的顺序输出















看看这样行不啦，这种在谭爷爷书里面常说是什么起泡法的，