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please help get compiler error

1 reply on 1 page. Most recent reply: Mar 15, 2004 11:59 PM by Coolest Head

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Nancy

Posts: 11
Nickname: ac121107
Registered: Feb, 2004

please help get compiler error Posted: Mar 15, 2004 2:25 PM
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My assignmsent is to write a program that roll 3 dice and repeat it 60000 times, sum the faces ,determines the frequency for each sum and the percentages. Totals the frequency and the prcentages.
Problems: Frequencies are not display in the applet. I wrote another piece of code and compiler says modifyArray(int) in Lab5 cannot be applied to modifyArray();
I was trying to modify the frequency array to obtain the percentages.
Any help is greatly appreciated
Thanks
Nancy
// Lab5.java
// Applet that simulates rolling of 3 dice, sum the faces, display the frequency in percentages and total both the 
// frequency and the percentages
 
import javax.swing.*;
import java.awt.*;
import java.awt.Container;
public class Lab5 extends JApplet {
	
    JTextArea outputArea;
	int face,frequency[] = new int[ 19 ];
	String output= "";
	double percent = 0.00;
	
	public void init() 	{
	    outputArea = new JTextArea();
		Container c = getContentPane();
		c.add (outputArea);
		outputArea.setFont(new Font("Courier", Font.ITALIC, 18));
		
		showArray();
		modifyArray();
	}
	public int rollDice()   {
		int die1, die2, die3;
		
	    //roll dice 60000 times
		for ( int roll= 1; roll <= 60000; roll++) {
	    die1 = 1 +(int) ( Math.random()  * 6 );
		die2 = 1 +(int) ( Math.random()  * 6 );
	    die3 = 1 +(int) ( Math.random()  * 6 );
        
	    face = die1+die2+die3;
        }
	    // use face value as subscript for frequency array
		++frequency[ face ];
		return face;
	}
	
	public void showArray()  {
    // append frequency to String output
	for (face=3; face < frequency.length; face++ ){
	output +="\n" + face + "\t" + frequency[face]+ "\t\t" + percent;
	
    outputArea.setText("Sum\tFrequency\t%"+"\n" + output );//+ "\n\n" + "Total");
	}
    }
 
    public void modifyArray(int frequency)   {
	   percent =  frequency/600;
	  
	   
    }
	    
 
}


Coolest Head

Posts: 5
Nickname: stkovrflow
Registered: Mar, 2004

Re: please help get compiler error Posted: Mar 15, 2004 11:59 PM
Reply to this message Reply
> My assignmsent is to write a program that roll 3 dice and
> repeat it 60000 times, sum the faces ,determines the
> frequency for each sum and the percentages. Totals the
> frequency and the prcentages.
> Problems: Frequencies are not display in the applet. I
> wrote another piece of code and compiler says
> modifyArray(int) in Lab5 cannot be applied to
> modifyArray();
> I was trying to modify the frequency array to obtain the
> percentages.
> Any help is greatly appreciated
> Thanks
> Nancy
>
> // Lab5.java
> // Applet that simulates rolling of 3 dice, sum the faces,
> display the frequency in percentages and total both the 
> // frequency and the percentages
> 
> import javax.swing.*;
> import java.awt.*;
> import java.awt.Container;
> public class Lab5 extends JApplet {
> 	
>     JTextArea outputArea;
> 	int face,frequency[] = new int[ 19 ];
> 	String output= "";
> 	double percent = 0.00;
> 	
> 	public void init() 	{
> 	    outputArea = new JTextArea();
> 		Container c = getContentPane();
> 		c.add (outputArea);
> outputArea.setFont(new Font("Courier", Font.ITALIC,
> C, 18));
> 		
> 		showArray();
>[u][b]		modifyArray(); [/b][/u]
> 	}
> 	public int rollDice()   {
> 		int die1, die2, die3;
> 		
> 	    //roll dice 60000 times
> 		for ( int roll= 1; roll <= 60000; roll++) {
> 	    die1 = 1 +(int) ( Math.random()  * 6 );
> 		die2 = 1 +(int) ( Math.random()  * 6 );
> 	    die3 = 1 +(int) ( Math.random()  * 6 );
>         
> 	    face = die1+die2+die3;
>         }
> 	    // use face value as subscript for frequency array
> 		++frequency[ face ];
> 		return face;
> 	}
> 	
> 	public void showArray()  {
>     // append frequency to String output
> 	for (face=3; face < frequency.length; face++ ){
> output +="\n" + face + "\t" + frequency[face]+ "\t\t" +
> + percent;
> 	
> outputArea.setText("Sum\tFrequency\t%"+"\n" + output
> tput );//+ "\n\n" + "Total");
> 	}
>     }
> 
>     public void modifyArray(int frequency)   {
> 	   percent =  frequency/600;
> 	  
> 	   
>     }
> 	    
> 
> }
> 



Look at where you are calling modifyArray(). You are calling it without parameters and yet your function definition has a int parameter. Get the idea???

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