Thread: Can't fix my own errors

Hello to all! First I would like to say that I am only a very real beginner. IN fact, I have recently started taking a Java Programming class, but have found it very interesting. Now I have messing around with a code. And for some reason, I can not get the problem solved. I have completed the same code but without the JOptionPane.showDialogBox.

My error message is


MarcsMac:cmis141 marcroberts$ javac RandomNumbers.java
RandomNumbers.java:21: cannot find symbol
symbol : variable answer
location: class RandomNumbers
if (one + two + three == answer)
^
Here is my code:


import javax.swing.JOptionPane;

public class RandomNumbers {
public static void main (String[] args) {

//Generate three random numbers
int one, two, three;
one = (int)(Math.random()*(10));
two = (int)(Math.random()*(10));
three = (int)(Math.random()*(10));

//What is the sum of these numbers
String sumOfNumbersString =
JOptionPane.showInputDialog(null,"What is the sum of " + one + "+" +
two + "+" + three + "?");

//Convert string to int
int sumOfNumbers =Integer.parseInt(sumOfNumbersString);

//Check the answer and Display Results
if (one + two + three == answer)
JOptionPane.showMessageDialog(null, "You are Correct!");
else
JOptionPane.showMessageDialog(null, "Sorry, that is Incorrect \n" +
one + "+" + two + "+" + three + " equals " + (one + two + three));

}
}

Did you bother to read the error message? It says that it can not find the variable called answer. I can't either. Can you?

Ok so, I got the right code finally


mport javax.swing.JOptionPane;

public class RandomNumbers {
public static void main (String[] args) {

//Generate three random numbers
int one, two, three;
one = (int)(Math.random()*(10));
two = (int)(Math.random()*(10));
three = (int)(Math.random()*(10));

//What is the sum of these numbers
String sumOfNumbersString =
JOptionPane.showInputDialog(null,"What is the sum of " + one + "+" +
two + "+" + three + "?");

//Convert string to int
int sumOfNumbers =Integer.parseInt(sumOfNumbersString);

//Check the answer and Display Results
if (one + two + three == answer)
JOptionPane.showMessageDialog(null, "You are Correct!");
else
JOptionPane.showMessageDialog(null, "Sorry, that is Incorrect \n" +
one + "+" + two + "+" + three + " equals " + (one + two + three));

}
}


I simply changed == answer to sumOfNumbers and all worked wonderfully!!

Originally Posted by mrroberts2u

Ok so, I got the right code finally
...
I simply changed == answer to sumOfNumbers and all worked wonderfully!!

So why don't you post the corrected code? Why post the bad code again?

import javax.swing.JOptionPane;

public class RandomNumbers {
public static void main (String[] args) {

//Generate three random numbers
int one, two, three;
one = (int)(Math.random()*(10));
two = (int)(Math.random()*(10));
three = (int)(Math.random()*(10));

//What is the sum of these numbers
String sumOfNumbersString =
JOptionPane.showInputDialog(null,"What is the sum of " + one + "+" +
two + "+" + three + "?");

//Convert string to int
int sumOfNumbers =Integer.parseInt(sumOfNumbersString);

//Check the answer and Display Results
if (one + two + three == sumOfNumbers)
JOptionPane.showMessageDialog(null, "You are Correct!");
else
JOptionPane.showMessageDialog(null, "Sorry, that is Incorrect \n" +
one + "+" + two + "+" + three + " equals " + (one + two + three));

}
}