新手 有什么简单的输入例子呢

没看懂你的意思
Console.Write("请输入名:");  String name = Console.ReadLine();

应该和我一样都是新手
            double x;
            double y;
            Console.Write("x=");
            x = Convert.ToDouble(Console.ReadLine());
            y = x * x * x;
            Console.WriteLine("y=" + y);