using System;
using System.Collections.Generic;
using System.Text;

namespace DefaultVal
{
    class Program
    {
        static void SaySth(string sthstr, string name)
        {
            if (name=="")
                name="Jim";
            Console.Out.WriteLine(name+ " says: "+sthstr);
        }

        static void Main(string[] args)
        {
            SaySth("hello", "");
        }
    }
}
/*
 Jim says: hello
请按任意键继续. . .
 */