#include <iostream>
#include <ctime>

using namespace std;

class Book
{
	char name[20];
	char author[20];
	size_t year;
	Book *ad = nullptr;

public:
	Book(){}

	Book(const char* name, const char* author, size_t year)
	{
		strcpy_s(this->name, name);
		strcpy_s(this->author, author);
		this->year = year;
	}

	void setName(const char* name) { strcpy_s(this->name, name); }
	void setAuthor(const char* author) { strcpy_s(this->author, author); }
	void setYear(size_t year) { this->year = year; }
	void addAd(Book *book) { this->ad = book; }

	char *getName() { return name; }
	char *getAuthor() { return author; }
	size_t getYear() { return year; }

	void adPrn()
	{
		if (ad != nullptr)
		{
			cout << "Advertise:\n";
			ad->bookprn();
		}
	}

	void bookprn()
	{
		printf("Author: %s\nName: %s\nYear: %d\n", author, name, year);
	}
};

int main()
{
	Book a("History", "Ivan", 1992);
	Book b("Geometry", "Pogorelov", 1988);

	a.bookprn();
	b.bookprn();
	/*a.setName("Math");
	a.setAuthor("Sergey");
	a.setYear(1991);
	a.bookprn(a);*/


	srand(time(NULL));

	string base = "I decided to make a random string generator for fun, and it works for the most part.Since I'm an amateur at programming, I thought I would post the code to get some feedback on it, and hopefully improve any bad habits";
	Book adv[20];
	adv[0] = a;
	adv[1] = b;
	for (int i = 2; i < 20; ++i)
	{
		size_t pos = rand() % (base.size() - 15);

		adv[i].setAuthor(base.substr(pos, rand()%15+1).c_str());

		pos = rand() % (base.size() - 20);
		adv[i].setName(base.substr(pos, 19).c_str());
		adv[i].setYear(rand() % 200 + 1819);
		adv[i].bookprn();
	}
	for (int i = 0; i < 20; ++i)
	{
		char adIndex;
		do
			adIndex = rand() % 20;
		while (adIndex == i);
		adv[i].addAd(&adv[adIndex]);
	}
	cout << "===============================================\n";
	adv[0].bookprn();
	adv[0].adPrn();
	adv[1].bookprn();
	adv[1].adPrn();

	system("pause");
}