// лаба2.cpp: определяет точку входа для консольного приложения.
//


#include "stdafx.h"
//#include <stdlib.h>
#include <iostream>


using namespace std;
const int N = 3;


void Add(int Q[], int *Last, int *cnt) {
	if (*cnt == N)
		cout << "Polna!" << endl;
	else {
		if (*Last == N) {
			*Last = 0;
		}
		cout << "Value" << endl;
		cin >> Q[*Last];
		*Last = *Last + 1;
		*cnt = *cnt + 1;
		cout << "Added" << endl;
	}
}

void Show(int Q[], int First, int Last, int cnt)
{
	int i;
	if (cnt != 0) {
		if (First < Last)
		{
			for (i = First; i < Last; i++)
			{
				cout << Q[i];
				cout << " ";
			}
		}
		else if (Last <= First) {
			for (i = First; i < N; i++)
			{
				cout << Q[i];
				cout << " ";
			}
			for (i = 0; i < Last; i++)
			{
				cout << Q[i];
				cout << " ";
			}
		}
		cout << "" << endl;
	}
	else {
		cout <<  "Pusto" << endl;
	}
}

void Delete(int Q[], int *First, int *cnt, int *Last) {
	if (*cnt == 0)
		cout << "Pusto!" << endl;
	else {
		Q[*First] = NULL;
		*First = *First + 1;
		if (*First == N) {
			*First = 0;
		}
		*cnt = *cnt - 1;
		if (*cnt == 0) {
			*First = 0;
			*Last = 0;
		}
		cout << "Deleted" << endl;
	}
}

int main()
{
	char otvet;
	int Q[N], Last = 0, First = 0;
	int cnt = 0;
	do {
		cout << "Menu" << endl;
		cout << "1. Add" << endl;
		cout << "2. Delete" << endl;
		cout << "3. Show" << endl;
		cout << "0. Exit" << endl;
		cin >> otvet;
		switch (otvet)
		{
		case '1':
			Add(Q, &Last, &cnt);
			break;
		case '2':
			Delete(Q, &First, &cnt, &Last);
			break;
		case '3':
			Show(Q, First, Last, cnt);
			break;
		}
	} while (otvet != '0');
	return 0;
}