C++指向结构体的指针

#include <iostream>
#include <cstring>

using namespace std;
void printBook( struct Books *book );

struct Books {
   char  title[50];
   char  author[50];
   char  subject[100];
   int   book_id;
};
int main() {
   struct Books Book1;        // Declare Book1 of type Book
   struct Books Book2;        // Declare Book2 of type Book

   // Book 1 specification
   strcpy( Book1.title, Learn C++ Programming);
   strcpy( Book1.author, Chand Miyan); 
   strcpy( Book1.subject, C++ Programming);
   Book1.book_id = 6495407;

   // Book 2 specification
   strcpy( Book2.title, Telecom Billing);
   strcpy( Book2.author, Yakit Singha);
   strcpy( Book2.subject, Telecom);
   Book2.book_id = 6495700;

   // Print Book1 info, passing address of structure
   printBook( &Book1 );

   // Print Book1 info, passing address of structure
   printBook( &Book2 );

   return 0;
}

// This function accept pointer to structure as parameter.
void printBook( struct Books *book ) {
   cout << Book title :  << book->title <<endl;
   cout << Book author :  << book->author <<endl;
   cout << Book subject :  << book->subject <<endl;
   cout << Book id :  << book->book_id <<endl;
}