Inkapsulyatsiya Merosxo‘rlik. Abstrakt sinflar Nazorat savollari

using namespace std;

class book_series{

public:

book_series(char *, char *, float);

void show_book(void); void set_pages(int);

private:

static int page_count; /*bu umumiy elеmеnt hisoblanadi*/

char title[64]; char author[64];

float price; };

int book_series::page_count; /*sinfdan tashaoidaumumiy o‘zgaruvchini e`lon qilish*/

void book_series::set_pages(int pages){

page_count = pages; }

book_series::book_series(char *title, char *author, float price){ /*Sinfning konstruktori*/

strcpy(book_series::title, title); /*string sinfiga ulanish uchun zarur bo‘lgan, strcpy() funksiyasi*/

strcpy(book_series::author, author);

book_series::price = price; }

void book_series:: show_book (void){

printf("Sarlavha: %s\n",title); printf("Muallif:%s\n",author);

printf("Narx: %.2f\n",price);

printf("Sahifalar: %d\n",page_count); }

void main(){

book_series programming("Studiing C++", "Author1", 22.95);

/*programming obyektini konstruktor yordamida yaratish*/

27. 
    book_series word( "Studiing to work with Word for Windows 7", "Author2", 19.95); /*word obyektini konstruktor yordamida yaratish*/
    
28. 
    word.set_pages(256); /*Word o`еktining sahifalari soni bеriladi, bu programmingga ham ta`sir qiladi */
    
29. 
    programming.show_book ();
    
30. 
    word.show_book() ;
    
31. 
    programming.set_pages(512); /*page_countni o‘zgartirish*/
    
32.