Question

JAVA 4.35 (Sides of a Triangle) Write an application that reads three nonzero values entered by the user and determines and prints whether they could represent the sides of a triangle.

Here's the code:

import java.util.Scanner;

class TriangleYN {
   public static void main(String[] args) {
       Scanner input = new Scanner(System.in);
      
       double a;
       double b;
       double c;
      
       System.out.print("Enter three sizes, separated by spaces(decimals values are acceptable):");
       a = input.nextDouble();
       b = input.nextDouble();
       c = input.nextDouble();
      
       if((a+b) > c)
       {
           if((a+c) > b)
           {
               if((b+c) > a)
               {
                   System.out.printf("A triangle could measure %.2f, %.2f, by %.2f.", a, b, c);

                   return;
               }
           }
       }
   }

}

So I'm having a problem getting the expected results.

Given the following was entered from the keyboard:
25 13 12

you displayed:
Enter three sizes, separated by spaces(decimals values are acceptable):
instead of:
Enter three sizes, separated by spaces(decimals values are acceptable):A triangle could not measure 25.00, 13.00, by 12.00.

Answer 1

Code:

import java.util.Scanner;
class TriangleYN {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
double a;
double b;
double c;   
do {
   System.out.print("Enter three sizes, separated by spaces(decimals values are acceptable):");
a = input.nextDouble();
b = input.nextDouble();
c = input.nextDouble();       
}
while(!((a + b > c)&&(b + c > a) &&(c + a > b)));
}
}

Output: