Arrays - User input

ohfaney · 05-01-2006, 09:26 PM

HI!

I posted last night, regarding a problem with one of my programs for my coursework - It's all good and working now.

However, There is one program set that I don't understand, what I am being asked to do is create a program that allows the user to input the number of a month (ex. january is month 1)and outputted is the name of the month.

The program is to repeat until the user enters '-1'

My problem/question is! How would I do this? I understand a basic Array, with fixed Strings/integers.

Should I use two loops? Two Arrays? it's confusing :S Sorry, i'm new to all this and it takes me a while to understand things.

I started the program earlier today, and i'm also not sure if I was doing it even remotely right.

Code:

// The "ArrayPractice2" class.
public class ArrayPractice2
    import java.io.*
{
    public static void main (String[] args)
        throws java.io.IOException
    {
        BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        String monthsArray[] = new String [12];
        String monthsArray[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
        String input;
        int pos;
        
        for (int i = 0; i < 12; i++)
        {
            monthsArray [i] = (int)
        
       

        } // main method
    } // ArrayPractice2 class

All help is appreciated and credited in my programs. =]

graemef · 05-01-2006, 09:51 PM

From your description I would suggest that what you want is a loop that will continue until a certain condition is met (namely the user enters -1) In that loop get the input from the user, if the number is -1 stop otherwise continue, if you are continuing you then want to check the number against the value in your month array.

So you first need to change your loop from a for loop to one that supports a condition
Next in the loop get the number from the user
Then display the month

As you write the code run and test it, but be aware that if you get it slightly wrong you program might end up in an infinite loop and so you will have to stop the program yourself.

ohfaney · 05-01-2006, 09:54 PM

So I can use an If statement? like if the user enters "1" it outputs pos 0? (january)..

graemef · 05-01-2006, 09:57 PM

Yes, inside the loop you can include an if, or a whole collection of them, one for each month!

ohfaney · 05-01-2006, 09:59 PM

you said i need to change my for loop to one that supports a condition, would that be something like a while/dowhile? or am i just insane? lol...

graemef · 05-01-2006, 10:08 PM

That's right a while or do while would be the right one. I didn't want to say which one because I wanted to make sure that you were awake in your class

I really hope that helps, especially since I off now.

ohfaney · 05-01-2006, 10:14 PM

haha - yeah there's intervals where i sleep, but it makes sense now =] thanks!