Pourquoi la dernière étape ne se valide pas alors qu'il n'y a pas d'else ? Have you an idea about the last validation step ? Because there is no else so I don't understand.

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Bonjour, Avez-vous une idée de pourquoi la dernière étape ne se valide pas alors qu'il n'y a pas d'else s'il vous plaît ? Merci d'avance pour votre aide. Hello, Have you an idea about the last validation step ? Because there is no else so I don't understand. Thanks in advance for your help.

package fr.codegym.task.task04.task0424; /* Trois nombres */ import java.io.*; import java.util.Scanner; public class Solution { public static void main(String[] args) throws Exception { //écris ton code ici Scanner input = new Scanner(System.in); int a = input.nextInt(); int b = input.nextInt(); int c = input.nextInt(); if ((a != b) && (a != c)) System.out.println("1"); else if ((b != a) && (b != c)) System.out.println("2"); else if ((c != a) && (c != b)) System.out.println("3"); } }

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Alice Quinton

niveau Paris, Paris, France

8 septembre 2021, 08:49

I've tried this code and it didn't work :

Scanner input = new Scanner(System.in);
         int a = input.nextInt();
         int b = input.nextInt();
         int c = input.nextInt();

         if (a != b && a != c)
         System.out.println("1");

         else if (b != a && b != c)
         System.out.println("2");

         else if (c != a && c != b)
             System.out.println("3");

         else if ((a != b) && (a != c) && (b != c))
             System.out.println();


    }
}

To drop out the "3" part ou to change it with a == b neither.

Lisa

8 septembre 2021, 10:56

solution

If you have implemented the condition a == b as well as you did with the code above, it cannot work (Does this sound rude? If so, then this is not my intention). I told you before, that the first if clause not only catches b == c but also a != b && a != c && c != b. This means that all following if else and else clauses are no longer considered, no matter how much you want it. You need to check this case before the others (or correctly implement my other suggestion). if (a == b) // 3 else if (a == c) // 2 else if (c == b) // guess what I'm going crazy, crazy... you're sooooo close 🤪😜

Guadalupe Gagnon

niveau Tampa, Tampa, United States

8 septembre 2021, 13:07

Remember that when you chain together "if" statements with "else if", it checks each condition in exact order until it finds one full statement that is true. It stops checking at that point, runs the code in that block and ignores the rest. So, as Lisa and I pointed out previously, Line 9 will be true if all the entered numbers are different so it will never reach lines 15 and 16 to output nothing. This is a logical error in the code and it will not pass until it has been addressed.

Alice Quinton

niveau Paris, Paris, France

8 septembre 2021, 13:58

I finally got it thanks a lot for your help 🙂

Lisa

8 septembre 2021, 20:29

Sweet... now go on and solve the next tasks 😊 Oh, Gua, how is it possible that your words always shine 'golden'? Maybe I should polish my rusty english a little bit. Yep, I should do that but on the other hand I'm lazy as hell. Hmm... don't worry Lisa, we just read more of Guas answers that'll do, too. Yeahhhh, that's it, yeah, yeah 🤪😜

Guadalupe Gagnon

niveau Tampa, Tampa, United States

7 septembre 2021, 17:56

The problem is a problem in logic. Lets take the numbers a: 5, b: 6, c: 7. If you take line 19:

if ((a != b) && (a != c)) // line 19

which reads if a does not equal b AND a does not equal c So, with those numbers above, a does not equal b and a does not equal c. That means this line would be true and the program would output 1. The task specifically says that if all the numbers are different then nothing should be output.

Lisa

7 septembre 2021, 17:54

If you eg. enter 1, 2, 3 then 1 is not equal to 2 and 1 is not equal to 3. So the first if clause will result in true and your code will output 1 even if you should output nothing (task conditions). You could either add another clause that checks if all entered numbers are different or you use other clauses like if (a == b) // output 3 huhuhuhuuuu, that's what I'd dooooo 😜🤪

Guadalupe Gagnon

niveau Tampa, Tampa, United States

7 septembre 2021, 17:56

bah... you type just a little bit faster than me =)

Gellert Varga

niveau Szekesfehervar, Szekesfehervar, Hungary

7 septembre 2021, 18:00

And I also wanted to write something, but I was the slowest, so I'll skip this one:-D

Lisa

7 septembre 2021, 18:02

Yee-haw... I'm a fast writer. A positive attribute I have 😜🤪