函数_方法_的四种调用方式

class Program
    {
        /// <summary>
        /// 无参数，无返回值
        /// </summary>
        /// <param name="args"></param>

        static void  n1()
        {
            Console.WriteLine("这是第一种方法");
        }
        /// <summary>
        /// 有参数，无返回值
        /// </summary>
        /// <param name="args"></param>
        static  void n2(string  a)               //这里必须是静态
    {
        Console.WriteLine(a);
    }
        /// <summary>
        /// 无参数，有返回值
        /// </summary>
        /// <returns></returns>
        static int n3()
        {
            return 100;
        }
        /// <summary>
        /// 有参数有，返回值
        /// </summary>
        /// <param name="args"></param>
        static int n4(string name)
        {
            Console.WriteLine(name);

            return 100;
        }
        static void Main(string[] args)
        {
            
            n1();
            Console.WriteLine("请输入一个字符串");
            string s = Console.ReadLine();
            n2(s);
            int b=n3();
            Console.WriteLine("返回值为" + b);
            int  i = n4("有参数，有返回值");
            Console.WriteLine("返回值为" + i);
            Console.ReadLine();
        }   
    }