using System;


    class a
    {
        public int max(int x, int y, int z)
        {
            if (x > y)
            {
                if (y > z)
                {
                    return x;
                }
                else
                    return x > z ? x : z;
            }
            else
            {
                if (y < z)
                {
                    return z;

                }
                else
                    return y;
            
            }
        }

      
    }
    class b
    {
        public static void Main()
        {
            int i=6, j=78, k=456;
            int Max=0;
           
            Max = max(i,j,k);
            Console.WriteLine("{0}", Max);
            Console.ReadLine();

        }
    }
我的目的是比较三个数的大小，按照书上的例子，他的意思是说：max()是公共的，可以直接调用；当我运行的时候为什么不去时呢？