1 files changed, 178 insertions, 0 deletions
diff --git a/week02/Exercise1.cpp b/week02/Exercise1.cpp
new file mode 100644
index 0000000..cb0e0c2
--- /dev/null
+++ b/week02/Exercise1.cpp
@@ -0,0 +1,178 @@
+#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;
+	}
+};