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Question about the task

Rule of the triangle

Java Syntax, Level 4, Lesson 4

Under discussion

Use the keyboard to enter three numbers a, b, and c (the lengths of the sides of the proposed triangle).
Determine whether a triangle with these sides can exist.
Display the result as follows:
"The triangle is possible." - if a triangle with these sides could exist.
"The triangle is not possible." - if a triangle with these sides cannot exist.

Hint:
A triangle can exist only if the sum of two of its sides is greater than the third side.
You need to compare each side with the sum of the other two.
If even one side is larger or equal to the sum of the other two sides, then no such triangle exists.

Requirements:

The program should read three numbers from the keyboard.
The program should display text on the screen according to the task conditions.
If a triangle with the specified sides could exist, you need to display: "The triangle is possible."
If a triangle with the specified sides cannot exist, you need to display: "The triangle is not possible."

package com.codegym.task.task04.task0415; /* Rule of the triangle */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String inputa = br.readLine(); int a = Integer.parseInt(inputa); String inputb = br.readLine(); int b = Integer.parseInt(inputb); String inputc = br.readLine(); int c = Integer.parseInt(inputc); if (a + b > c) System.out.println("The triangle is possible."); else if (b + c > a) System.out.println("The triangle is possible."); else if (a + c > b) System.out.println("The triangle is possible."); else if ((a + b) <= c) System.out.println("The triangle is not possible"); else if ((b + c) <= a) System.out.println("The triangle is not possible"); else if ((a + c) <= b) System.out.println("The triangle is not possible"); } }

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Hannah Software Architect

8 January 2020, 14:52

Yeah like Shuy I think it depends on the dot. I don't see any other mistake. And you could make your code a little bit shorter by listing of every result, where a triangle can/can't exist and then just use

else{}

for the other cases. So it looks like this.:

if (triangle is possible) {
     System.out.println("The triangle is possible.");
}
else if (triangle is possible) {
     System.out.println("The triangle is possible.");
}
else if (triangle is possible) {
     System.out.println("The triangle is possible.");
}
else {
      System.out.println("The triangle is not possible.")
}

You don't need to write every case of is possible and is not possible. Your code would the look like this:

if (a + b <= c) {
            System.out.println("The triangle is not possible.");
        }
        else if (a + c <= b) {
            System.out.println("The triangle is not possible.");
        }
        else if (b + c <= a) {
            System.out.println("The triangle is not possible.");
        }
        else {
            System.out.println("The triangle is possible."); //There is the mentioned case
        }

Shuy

Level 9 , Frankfurt, Germany

8 January 2020, 07:16

Havent checked all of your code but the problem might be the missing dot "." at the end of "The triangle is not possible".