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  #1  
Old 09-03-2009
Member
 
Join Date: Feb 2009
Posts: 96
given this code

why doesnt the sum work?

public static void main(String[] args){


String Input;
double[] numbers; // An array for storing the input values.
int numCt; // The number of numbers saved in the array.
double num; // One of the numbers input by the user.

numbers = new double[4]; // Space for 5 doubles.
numCt = 0; // No numbers have been saved yet.

Input = JOptionPane.showInputDialog(null, "Please enter a price.");

while (numCt < numbers.length) { // Get the numbers and put them in the array.
Input = JOptionPane.showInputDialog(null, "Please enter a price.");
num = Double.parseDouble(Input);
if (num <= 0)
break;
numbers[numCt] = num;
numCt++;
}
prices aPrice = new prices();
double s;
s = aPrice.getSum();

//aveArray(numbers);
//highPrices();
JOptionPane.showMessageDialog(null,"The sum of the prices is " + s);
// JOptionPane.showMessageDialog(null,"ddd" + nag);
//}
System.exit(0);
}
public double getSum()
{
double[] numbers = new double[4];
double Sum = 0; // Start the total sum at 0.
for (int i=0; i<numbers.length; i++) {
Sum = Sum + numbers[i]; // Add the next element to the total

}
return Sum;
}
public void setSum(double numbers)
{
Sum = numbers;
}
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  #2  
Old 09-03-2009
Member
 
Join Date: Dec 2008
Posts: 202
Re: given this code

The Above written code seems to perfect but have you properly Import the Global Methods in the header, because if you forget to import that into your program then still there are possibilities that the code might not run.

such as:
import javax.swing.*;
import javax.swing.text.html.HTMLEditorKit;
import java.awt.*;
import java.io.*;

What error this program gives when you Execute the program.
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  #3  
Old 09-03-2009
Member
 
Join Date: Feb 2009
Posts: 96
Re: given this code

import java.util.*;
import javax.swing.JOptionPane;


now the error is that the sum always comes out blank
it says
the sum is 0
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