C#定义结构

using System;

struct Books {
   public string title;
   public string author;
   public string subject;
   public int book_id;
};  

public class testStructure {

   public static void Main(string[] args) {
      Books Book1;   /* Declare Book1 of type Book */
      Books Book2;   /* Declare Book2 of type Book */

      /* book 1 specification */
      Book1.title = C Programming;
      Book1.author = Nuha Ali; 
      Book1.subject = C Programming Tutorial;
      Book1.book_id = 6495407;

      /* book 2 specification */
      Book2.title = Telecom Billing;
      Book2.author = Zara Ali;
      Book2.subject =  Telecom Billing Tutorial;
      Book2.book_id = 6495700;

      /* print Book1 info */
      Console.WriteLine( Book 1 title : {0}, Book1.title);
      Console.WriteLine(Book 1 author : {0}, Book1.author);
      Console.WriteLine(Book 1 subject : {0}, Book1.subject);
      Console.WriteLine(Book 1 book_id :{0}, Book1.book_id);

      /* print Book2 info */
      Console.WriteLine(Book 2 title : {0}, Book2.title);
      Console.WriteLine(Book 2 author : {0}, Book2.author);
      Console.WriteLine(Book 2 subject : {0}, Book2.subject);
      Console.WriteLine(Book 2 book_id : {0}, Book2.book_id);       

      Console.ReadKey();
   }
}