Season currentSeason,nextSeason;

currentSeason = Season.Spring;

nextSeason = currentSeason + ;

Console.WriteLine("当前季节为：{0},{1}",int)currentSeason,currentSeason);

Console.WriteLine("下一个季节为：{0}",nextSeason);

Console.ReadKey(true);        

 public enum Season

{

            Spring = ,

            Summer,

            Autumn = ,

            Winter,

} 

Student stu;

stu.stu_no = ;

stu.stu_name = "陈";

stu.age = ;

stu.sex = "男";

Console.WriteLine("姓名：{0}",stu.stu_name);

Console.WriteLine("学号：{0}",stu.stu_no);

Console.WriteLine("年龄：{0}",stu.age);            

Console.WriteLine("性别：{0}",stu.sex);

struct Student

{

      public int stu_no;

      public string stu_name;

      public int age;

      public string sex;

}