dwrswr/cpp-module-06-guide

1#include "identify.hpp"2#include "A.hpp"3#include "B.hpp"4#include "C.hpp"5#include <cstdlib>6#include <ctime>7#include <exception>8#include <iostream>9 10Base	*generate(void)11{12	static bool	seeded = false;13 14	if (!seeded)15	{16		std::srand(static_cast<unsigned int>(std::time(NULL)));17		seeded = true;18	}19	switch (std::rand() % 3)20	{21		case 0:22			return (new A());23		case 1:24			return (new B());25		default:26			return (new C());27	}28}29 30void	identify(Base *p)31{32	if (dynamic_cast<A *>(p))33		std::cout << "A" << std::endl;34	else if (dynamic_cast<B *>(p))35		std::cout << "B" << std::endl;36	else if (dynamic_cast<C *>(p))37		std::cout << "C" << std::endl;38}39 40void	identify(Base &p)41{42	try43	{44		(void)dynamic_cast<A &>(p);45		std::cout << "A" << std::endl;46		return ;47	}48	catch (std::exception &)49	{50	}51	try52	{53		(void)dynamic_cast<B &>(p);54		std::cout << "B" << std::endl;55		return ;56	}57	catch (std::exception &)58	{59	}60	try61	{62		(void)dynamic_cast<C &>(p);63		std::cout << "C" << std::endl;64	}65	catch (std::exception &)66	{67	}68}69