Question

Java problem

How to write a method that does not take any paramter which returns the circumference of the triangle formed by 3 points and returns -1 if it is unvalid?

thanks.

Answer 1

import java.util.Scanner;

public class TriangleCircum {
   public static void main(String[] args) {
       System.out.println("Circumstance: " + getCircumstance());
   }
   public static double getCircumstance() {
       Scanner sc = new Scanner(System.in);

//reading values from user
       System.out.println("Enter 3 sides of triagnle: ");
       double side1 = sc.nextDouble();
       double side2 = sc.nextDouble();
       double side3 = sc.nextDouble();
       sc.close();

// checking for valid sides
       if ((side1 + side2) > side3)
           return -1;

//returning circumstance of triangle
       return side1 + side2 + side3;
   }
}