include iostream include stdio using namespace std bool analysator cha

#include <iostream>
#include <stdio.h>
using namespace std;

bool analysator()
{
	char in = getchar();
	char state = 'H';

	while (in != '\n')
	{
		switch (state)
		{
			case 'H':
				if (in == '0') state = 'X';
				else if (in == '1') state = 'C';
				else return 0;
				break;
			case 'X':
				if (in == '1') state = 'Y';
				else return 0;
				break;
			case 'Y':
				if (in == '0') state = 'X';
				else if (in == '1') ;
				else return 0;
				break;
			case 'C':
			    if (in == '0') state = 'X';
			    else return 0;
				break;
		}

		in = getchar();
	}

	if (state == 'C' || state == 'Y') return 1;
	else return 0;
}

int main()
{
	setlocale(LC_ALL, "Russian");

	cout << "Введите цепочку для проверки: ";

	if (analysator()) cout << "\nЦепочка принадлежит грамматике\n";
	else cout << "\nЦепочка не принадлежит грамматике\n";
	return 1;
}