protect.cpp

来自「C/C++使用技巧1001例一书的配套代码」· C++ 代码 · 共 42 行

#include <iostream.h>
#include <string.h>

class Book {
  public:
    Book(char *title) { strcpy(Book::title, title); }; 
    void show_title(void) { cout << title << endl; };
  protected:
    float cost;
    void show_cost(void) { cout << cost << endl; };
  private:
    char title[64];
};

class LibraryCard : public Book {
  public:
    LibraryCard(char *title, char *author, char *publisher) : Book(title) 
      { 
        strcpy(LibraryCard::author, author); 
        strcpy(LibraryCard::publisher, publisher); 
        cost = 39.95;
      };
    void show_library(void) { 
        show_title();
        show_cost();
        cout << author << ' ' << publisher; };
  private:
    char author[64];
    char publisher[64];
};


void main(void)
 {
   LibraryCard card("Jamsa's 1001 C/C++ Tips", "Jamsa", "Jamsa Press");
   card.show_library();
 }