IV-Part 2

#include <iostream>
#include <cmath>
using namespace std;

float F(float x)
{
	if (x*x + 2 * x + 1 < 2)
		return x*x;

	else if (2 <= x*x * 2 + 1 < 3)
		return 1 / x*x - 1;

	else return 0;
}

void F(float x, float &y)
{
	if (x*x + 2 * x + 1 < 2)
		y = x*x;

	else if (2 <= x*x + 2 * x + 1 < 3)
		y = 1 / x*x - 1;

	else y = 0;
}
int main()
{
	float x;
	float y;
	cout << "x=";
	cin >> x;
	cout<<"F(x)=" << F(x) << endl;
	F(x, y);
	cout<<"F(x,y)="<<"("<< x << ";" << y<<")" << endl;
	system("pause");
	return 0;
}