კვადრატული განტოლება (Java)

quadratic.java

import java.util.Scanner;

public class Quadratic {

	public static void main(String[] args) {
		double a,b,c,d,x1,x2;
		Scanner scanner = new Scanner(System.in);
		System.out.print("Sheiyvanet a koeficienti: ");
		a = scanner.nextDouble();
		System.out.print("Sheiyvanet b koeficienti: ");
		b = scanner.nextDouble();
		System.out.print("Sheiyvanet c koeficienti: ");
		c = scanner.nextDouble();
		d = b*b - 4*a*c;
		if (d < 0)
			System.out.println("Gantolebas amonaxsni ar akvs");
		else if (d == 0) {
			x1 = -b / (2*a);
			System.out.println("Gantolebas akvs erti amonaxsni: " + x1);
		} else if (d > 0) {
			x1 = Math.round( ((-b - Math.sqrt(d)) / (2*a)) * 1000.0) / 1000.0;
			x2 = Math.round( ((-b + Math.sqrt(d)) / (2*a)) * 1000.0) / 1000.0;
			System.out.println("Gantolebis amonaxsnebi:");
			System.out.println("x1 = " + x1);
			System.out.println("x2 = " + x2);
		}
	}

}