c#结构

结构：一次性声明多个变量

struct Books
{public string title;public string author;public string subject;public int book_id;
};public class StructTest
{public static void Main(string[] args){Books Book1;Books Book2;Book1.title = "c#从入门到放弃";Book1.author = "hollis"; Book1.subject = "C# Programming Tutorial";Book1.book_id = 12345;Book2.title = "c++从入门到放弃";Book2.author = "hollis";Book2.subject =  "C++ Billing Tutorial";Book2.book_id = 54321;}