package haromszog;

public class Haromszog {

    public static void main(String[] args) {
        
        double perimeter = calcPerimeter(30, 35, 40);
        System.out.println("Perimeter: " + perimeter);
    }

    public static double calcPerimeter(double sideA, double sideB, double sideC) {        
        double perimeter = -1;
        if(isEditable(sideA, sideB, sideC)) {
            perimeter = sideA + sideB + sideC;
        }
        return perimeter;
    }
    
    public static boolean isEditable(double sideA, double sideB, double sideC) {
        boolean editable = true;
        if(sideA + sideB < sideC) {
            editable = false;
        }
        if(sideA + sideC < sideB) {
            editable = false;
        }
        if(sideB + sideC < sideA) {
            editable = false;
        }
        return editable;
    }
}