ユーザーは、私が集めなければならない本を配列に入力します。2冊目に入ると、1冊目がえりせんなのですが、その理由を教えていただけませんか？BOOK aux をグローバルに定義しました...
収集できない理由を理解するのを手伝ってもらえますか
#define stop __asm nop
#include "book.h"
#include <iostream>
#include <cstdio>
using namespace std;
int counter = 0;
BOOK aux [1];
void print_catalogue()
{
}
void print_book(BOOK aBook)
{
cout << endl;
cout <<aBook.Autor<<", "<<aBook.Title<<", "<<aBook.Year<<", "<<aBook.PageCount<<", "<<aBook.Cost<<endl;
}
void new_book()
{
BOOK temp;
system("cls");
cin.getline (temp.Autor, 20);
cout <<"ENTERING NEW BOOK: " << endl <<endl;
cout <<"Input the author: ";
cin.getline (temp.Autor, 20);
cout <<"Input the title: ";
cin.getline (temp.Title, 50);
cout <<"Input the year of publishing: ";
cin >> temp.Year;
cout <<"Input the number of pages: ";
cin >> temp.PageCount;
cout <<"Input the cost: ";
cin >> temp.Cost;
cout << endl;
counter++;
BOOK * pn = new BOOK [counter];
if (counter > 0)
{
memcpy(pn, aux, counter * sizeof(BOOK));
}
pn[counter - 1] = temp;
BOOK * aux = new BOOK[counter];
memcpy(aux,pn, counter * sizeof(BOOK));
delete[] pn;
for (int i = 0; i < counter; i++)
{
print_book(aux[i]);
}
system("pause");
return;
}
void delete_books()
{
}
void write_catalogue()
{
}
void read_catalogue()
{
}
void menu()
{
char command;
do
{
system("cls");
cout << "p - Print the whole catalogue."<< endl;
cout << "n - Input a new book." << endl;
cout << "d - Delete existing book(s)." << endl;
cout << "w - Write the catalogue to a file." << endl;
cout << "r - Read the catalogue from a file." << endl;
cout << "Input a new command: ";
cin >> command;
cout << endl << endl;
switch (command)
{
case 'p': print_catalogue(); break;
case 'n': new_book(); break;
case 'd': delete_books(); break;
case 'w': write_catalogue(); break;
case 'r': read_catalogue(); break;
case 'q': return;
default :
{
cout << "Please, enter a correct command." << endl;
system("pause");
}
}
} while(true);
}
void main()
{
menu();
}