函数调用

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class Program     {          public struct chengji         {           public double tiyu;                                    }            struct Student          {              public string Name;              public string Age;              public chengji Chengji;                       }           static void  Out()       {         Console.WriteLine("你好！");     }         static void Out(string name)         {               Console.WriteLine("你好！" + name);           }         static int Outa(string name)         {               Console.WriteLine("你好！" + name);               return 100;         }             static void Main(string[] args)         {             Out();               Out("再见");               int l = Outa("你好，再见");                                               Student stu = new Student();             stu.Name = "张三";               stu.Age = "20";             stu.Chengji.tiyu = 88;               Console.WriteLine("学生姓名" + stu.Name + "学生年龄" + stu.Age + "学生成绩" + stu.Chengji);                 Console.ReadLine();