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

using namespace std;


int main()
{
	double x, y;
	cout << "enter x:" << endl;
	cin >> x;

	if (x <= 0) {
		y = -1 * x;
		cout << y << endl;
	}
	else if ((x > 0) && (x <= 1)) {
		y = x;
		cout << y << endl;
		if ((y < 0) && (y > 1)) {
			cout << "out of range:" << endl;
		}
	}
	else if ((x > 1) && (x <= 2)) {
		y = 1;
		cout << y << endl;

	}
	else if ((x > 2) && (x <= 3)) {
		y = -0.5 * (x);
		if ((y >= 1) && (y <= -1))
			cout << "out of range" << endl;
	}

	system("pause");
	return 0;

}