Problem that I can't solve...

[Wing.Sham]

Hi guys, I want input angle a,b,c that is in the range of 0-180. Otherwise, it would not make a quadrilateral shape. I have made an attempt using an 'if' statement, but it doesn't do what I want it to.

note that Min = 0 Max=180.

Here's a piece of my code:

System.out.println("Enter Angle A = ");
int AA = input.nextInt();
if ((AA < MIN) && (AA > MAX)); {
System.out.println("This is not in the range.");
}

Say i input 999 for angle A, it inputs it and shows a message saying "This is not in the range." - YES!
However, I want another "int AA = input.nextInt();" to input again so the user can input a number again and replaces the previous number. I have tried this and it doesn't work and get errors. :(

thanks.

[KimChi93]

I suggest you place a forloop around this that will keep running until the user enters a value that is within the range. Then write the else coding for what you want it to do if the angle is within the range.

[Wing.Sham]

I suggest you place a forloop around this that will keep running until the user enters a value that is within the range. Then write the else coding for what you want it to do if the angle is within the range.

Ah i see. Is it possible to use while statement??

[KimChi93]

I can't see why not, but either way should work

[Junky]

Yes a while loop would be best. Also how can a value be less than 0 AND greater than 180?

[Wing.Sham]

I can't see why not, but either way should work

its just that i tried using while statement. And using ''int AA = input.nextInt();'' again I get an error because the constructor is not at the top, it's below the code I have showed in my post. If I moved it at the top, I would get tons of errors.

[Wing.Sham]

The thing is... I have not started using loops in java. We start that tomorrow. I'll give it a try and see if it works. Would I have to use ++ to increment??

[KimChi93]

You can put a nice big IF around the while statement

[Wing.Sham]

You can put a nice big IF around the while statement

Alright. I'll do my best. Because I have to submit it tomorrow, it doesn't matter if this validation doesn't work, at least I got most of it working. I have more assignments coming up. So I will do better on those. Thanks Kimchi :)

[Junky]

Pseudocode

declare boolean
while input is invalid {
    get input
    if input is valid {
        change boolean
    } else {
        display error message
    }
}