Ex9_PointsInsideHouse

package javaSyntax;

import java.util.Scanner;

public class Ex9_PointsInsideHouse {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        double x = in.nextDouble();
        double y = in.nextDouble();

        double x1 = 12.5, y1 = 8.5;
        double x2 = 17.5, y2 = 3.5;
        double x3 = 22.5, y3 = 8.5;

        double abc = Math.abs(x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2));
        double abp = Math.abs(x1 * (y2 - y) + x2 * (y - y1) + x * (y1 - y2));
        double apc = Math.abs(x1 * (y - y3) + x * (y3 - y1) + x3 * (y1 - y));
        double pbc = Math.abs(x * (y2 - y3) + x2 * (y3 - y) + x3 * (y - y2));

        boolean isInTriangle = false;
        if (abp + apc + pbc == abc) {
            isInTriangle = true;
        }

        if ((x >= 12.5 && x <= 17.5) && (y <= 13.5 && y >= 8.5)) {
            System.out.println("Inside");
        } else if ((x >= 20 && x <= 22.5) && (y <= 13.5 && y >= 8.5)) {
            System.out.println("Inside");
        } else if (isInTriangle) {
            System.out.println("Inside");
        } else {
            System.out.println("Outside");
        }

    }
}