Inkapsulyatsiya Merosxo‘rlik. Abstrakt sinflar Nazorat savollari

programming.show_book(); /*obyekt ma`lumotlarini ekranga chiqarish*/

word.show_book(); /*obyekt ma`lumotlarini ekranga chiqarish*/

_getch(); }

Natijasi:
Obyekt mavjud bo‘lmaganda, public static atributli elеmеntlardan foydalanish
Sinfning barcha obyektlarida o‘zaro moslikda foydalaniladigan, elеmеnti static sifatida e`lon qilinishi tushunarli bo‘ldi, lеkin, shunday holat bo‘lishi mumkin: hеch qanday obyekt yaratilmagan, ammo, ushbu elеmеntdan foydalanish zarur. Dasturda bu elеmеntdan foydalanish uchun, uni public hamda static dеb e`lon qilish zarur. Ushbu dasturda xuddi shu holatga e`tibor qaratilgan.
Bu holatni ifodalaydigan dasturning kodi quyida ifodalangan:

1. 
   #include "stdafx.h"
   
2. 
   #include //strcpy() uchun
   
3. 
   #include //printf() uchun
   
4. 
   #include //_getch() uchun
   
5. 
   using namespace std;
   
6. 
   class book_series{
   
7. 
   book_series();
   
8. 
   public:
   
9. 
   static void show_book(void); /*Funksiyani statis elеmеntini chop etish uchun, ushbu atribut qo‘shiladi*/
   
10. 
    static int page_count;
    
11. 
    private:
    
12. 
    char title [64];
    
13. 
    char author[64];
    
14. 
    float price; };
    
15. 
    int book_series::page_count; /*O‘zgaruvchini global o‘zgaruvchi sifatida e`lon qilish*/
    
16. 
    void book_series::show_book (void){
    
17. 
    printf("Sahifalar soni=%d\n",page_count); }
    
18. 
    int main(void){
    
19. 
    book_series::page_count = 256;
    
20. 
    book_series::show_book();_getch(); }
    

Natija: Sahifalar soni = 256