using System;
class Program
{
      
        static void Main()
        {
            Console.WriteLine(ShowComputer());
            Console.WriteLine(ShowComputer("P5300","1G"));
            Console.Read();
        }
 
        private static string ShowComputer(string cpu = "2.4Ghz" , string ram = "2g" , string disk = "500g")
        {
            return "My computer ... \nCpu:" + cpu + "\nRam:" + ram + "\nDisk:" + disk + "\n";
        }
}
怎样才能使这段代码运行，还有问一下参数的价值究竟是什么，用变量不已经是很好了吗？谢谢