Thread: I just need help with this WHOLE program, O boy.

Post what you have so far with the FULL text of the errors you are getting.
If the program is executing but not giving what you want, show its output and show what you want it to do instead.

To get your logic working, start with a small program with a String of digits and get the count to work with that first.

Good luck on getting it working by tonight.

ya..i got nothing
I have something that i think may work for the PiCounter but I cannot do drivers!
can someone spot check my PiCounter and help with PiDriver?

import java.util.Scanner;
import java.io.File;
import java.io.IOException;
public class PiCounter
{
public static void main(String[] args) throws IOException
{
Scanner inFile = new Scanner(new File("digitsOfPt.txt"));
int[] counter = new int[11];
String token = "";
 
while(inFile.hasNext())
{
token += inFile.next();
}
 
for(int i = 0; i < token.length(); i++)
{
String character = token.substring(i, i + 1);
if((int)character >= 48 && (int)character <= 57)
{
character = Integer.parseInt(character);
counter[character]++;
}
else
{
counter[10]++;
}
}
 
}
}

What is the problem with the code you posted?

You can use Arrays.toString(counter) to format an array for debugging output.

What are the numbers in this code:
if((int)character >= 48 && (int)character <= 57)

Are you comparing against the characters '0' and '9'?
The code would be much easier to understand if you used characters vs decimal values.

See also NEED help with this program, if anyone could do it id appreciate it a LOT - Java Forums

Two questions.

1) isnt Pi just equal to 22/7? Dont think the question is very relevant to the problem, just wanted to confirm that.

2) are you getting an index out of bounds error? Because you should be. You have set counter to have 11 spots. And in your if statement, you are referencing values based on the variable character. However in your if statement, you are checking if character is between 48 and 57. So basically, you are trying to reference array spots 48 through 57, which are WAY out of bounds. Also, the call (int)(String) cannot be done, which you are trying to do in your if statement. However, you can do Integer.parseInt(String), which you have also used in your if statement. There are two ways to cast ints, and I think you confused them. You can do Integer.parseInt(String), which will convert the String to an int. Or you can do (int)(double) to case the double as an int, by cutting off the decimals.

Originally Posted by aussiemcgr

Two questions.

1) isnt Pi just equal to 22/7? Dont think the question is very relevant to the problem, just wanted to confirm that.

no pi isnt equal to 22/7, that is just the closest fraction resembling pi. 22/7 = 3.14285714
pi =3.14159265...etc