// Zadanie_3_XIII.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <clocale>
#include <math.h>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	setlocale(LC_CTYPE, "rus");
	double a,y;
	cout<<"Введите а:\n";
	cin>>a;
	if(a<-2)
		y=(-5.0/3)*a-10.0/3;
	else
		if((a==-2)||(a==2))
			y=0;
		else
			if((a>-2)&&(a<2))
				y=pow(4-a*a,1.0/2);
			else
				if(a>2)
					y=(5.0/3)*a-10.0/3;
				else
					cout<<"debug";
	cout<<"y:\n";
	cout<<y; cout<<endl;
	return 0;
}