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#include <iostream>
#include <cstring>
struct Book {
private:
char title[1024];
char** authors;
int authorsCount;
int published;
float price;
void deleteAuthors() {
for (int i = 0; i < authorsCount; i++) {
delete[] authors[i];
}
delete[] authors;
}
public:
Book(const char* title, char** authors, int authorsCount, int published, float price) {
setTitle(title);
this->authorsCount = 0;
setAuthors(authors, authorsCount);
setPublished(published);
setPrice(price);
}
~Book() {
deleteAuthors();
}
char* getTitle() {
return title;
}
bool setTitle(const char* newTitle) {
if (newTitle[0] == '\0') return false;
strcpy(title, newTitle);
return true;
}
int getAuthors(char** ref) {
ref = authors;
return authorsCount;
}
bool setAuthors(char** newAuthors, int count) {
if (count == 0) return false;
deleteAuthors();
authors = new char*[count];
for (int i = 0; i < count; i++) {
if (newAuthors[i][0] == '\0') continue;
authors[i] = new char[strlen(newAuthors[i]) + 1];
strcpy(authors[i], newAuthors[i]);
}
return true;
}
int getPublished() {
return published;
}
bool setPublished(int newYear) {
if (newYear < -2100 || newYear > 2024) return false;
published = newYear;
return true;
}
float getPrice() {
return price;
}
bool setPrice(float newPrice) {
if (newPrice <= 0) return false;
price = newPrice;
return true;
}
};
struct Library {
private:
Book** books;
int* counts;
int amountOfBooks;
int reservedSpace;
void resize() {
reservedSpace *= 2;
Book** newBooks = new Book*[reservedSpace];
for (int i = 0; i < amountOfBooks; i++) {
newBooks[i] = books[i];
}
delete[] books;
books = newBooks;
int* newCounts = new int[reservedSpace];
for (int i = 0; i < amountOfBooks; i++) {
newCounts[i] = counts[i];
}
delete[] counts;
counts = newCounts;
}
int findBook(const char* title, int year) {
for (int i = 0; i < amountOfBooks; i++) {
if (books[i]->getPublished() == year && strcmp(books[i]->getTitle(), title) == 0) {
return i;
}
}
return -1;
}
void deleteBook(int index) {
delete books[index];
for (int i = index; i < amountOfBooks - 1; i++) {
books[i] = books[i+1];
counts[i] = counts[i+1];
}
amountOfBooks--;
books[amountOfBooks] = nullptr;
}
public:
Library() {
amountOfBooks = 0;
reservedSpace = 2;
books = new Book*[reservedSpace];
counts = new int[reservedSpace];
}
~Library() {
for (int i = 0; i < amountOfBooks; i++) {
delete books[i];
}
delete[] books;
delete[] counts;
}
bool AddBook(Book& book) {
if (findBook(book.getTitle(), book.getPublished()) > -1)
return false;
if (amountOfBooks == reservedSpace)
resize();
char** authors = nullptr;
int authorsCount = book.getAuthors(authors);
books[amountOfBooks++] = new Book(book.getTitle(), authors, authorsCount, book.getPublished(), book.getPrice());
return true;
}
bool RemoveBook(const char* title, int year) {
int ind = findBook(title, year);
if (ind < 0) return false;
deleteBook(ind);
return true;
}
bool StockBook(const char* title, int year, int stockWith) {
int ind = findBook(title, year);
if (ind < 0) return false;
counts[ind] += stockWith;
return true;
}
bool SellBook(const char* title, int year, int soldCount) {
int ind = findBook(title, year);
if (ind < 0) return false;
counts[ind] -= soldCount;
return true;
}
};
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