Programming Forums > Application Development > Java

cribbageman2500 · May 9th, 2008, 8:38 PM

Hello everyone! This is the first time I have really tried to program, so I'd like to apologize in advance if the code I'm about to present is god-awful. Here's the basic idea, A certain # of 10 sided dice (w/ values 1-10) will be rolled, if the resulting number on any die is above a certain threshold it will be recorded and if it above another threshold then it will be recorded, and "rolled" again.

For example If I instructed it to roll 5 dice with a threshold of 8 and a repeat of 10 and the results were: 1,3,7,10,8
the program would tally the 2 successes and "roll" the ten again resulting in a 9,
there would then be 3 successes and the program would end and output the tally to a text area.

So far I have an almost functional program, the current issue is that it will only allow the generation of one # at a time. If more then one "roll" is requested, or it hits the again threshold when rolling 1 die it will run forever.

Just so you know I'm implementing it into a GUI, but for simplicity's sake I'll leave that code out. And if it matters I'm working in the Net Beans IDE.

 java Syntax (Toggle Plain Text) 
import java.util.*;
import javax.swing.*;
 
public class D10sim extends javax.swing.JFrame {
 
 
 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    int gen, tally, num1;
    double dice = Double.parseDouble(jTextField1.getText());
    double thresh = Double.parseDouble(jTextField2.getText());
    double again = Double.parseDouble(jTextField3.getText());
    gen = 0;
    tally = 0;
    {num1 = (int) ((Math.random() * 10) + 1);
     while (gen<dice)
    {if (num1>=again)
     {dice ++;
      tally ++;
        gen ++;}
     else
         if (num1>=thresh)
         {tally ++;
          gen ++;}
         else
             if (num1<thresh)
             {gen ++;}
        jTextArea1.setText(String.valueOf(tally));
    }
    }
 
}
import java.util.*;
import javax.swing.*;

public class D10sim extends javax.swing.JFrame {


 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    int gen, tally, num1;
    double dice = Double.parseDouble(jTextField1.getText());
    double thresh = Double.parseDouble(jTextField2.getText());
    double again = Double.parseDouble(jTextField3.getText());
    gen = 0;
    tally = 0;
    {num1 = (int) ((Math.random() * 10) + 1);
     while (gen<dice)
    {if (num1>=again)
     {dice ++;
      tally ++;
        gen ++;}
     else
         if (num1>=thresh)
         {tally ++;
          gen ++;}
         else
             if (num1<thresh)
             {gen ++;}
        jTextArea1.setText(String.valueOf(tally));
    }
    }
    
}

Thank you in advance you your help, any advice is much appreciated.

Jabo · May 10th, 2008, 12:15 AM

Quote:

Originally Posted by cribbageman2500

 java Syntax (Toggle Plain Text) 
{num1 = (int) ((Math.random() * 10) + 1);
{num1 = (int) ((Math.random() * 10) + 1);

This opens with a { and closes with a ) (hint, count your opening and closing brackets, braces and perenthesis to make sure they match).
Also, I think you want your num1 to equal Math.random()%10, the modulus operator. I'm not sure the exact syntax Java uses though.

Quote:

Originally Posted by cribbageman2500

 java Syntax (Toggle Plain Text) 
while (gen<dice)
    {if (num1>=again)
     {dice ++;
      tally ++;
        gen ++;}
     else
         if (num1>=thresh)
         {tally ++;
          gen ++;}
         else
             if (num1<thresh)
             {gen ++;}
        jTextArea1.setText(String.valueOf(tally));
    }
    }
 
}
while (gen<dice)
    {if (num1>=again)
     {dice ++;
      tally ++;
        gen ++;}
     else
         if (num1>=thresh)
         {tally ++;
          gen ++;}
         else
             if (num1<thresh)
             {gen ++;}
        jTextArea1.setText(String.valueOf(tally));
    }
    }
    
}

I don't even know where to start on this. You should look into using arrays for one. An array would let you store each roll (which I'm sure you're going to want to do) or each successful roll, or whatever. An array is perfect for this.

Also, you can clean your code up a bit by removing the redundant statements. Only increment a variable in one conditional statement, not in every conditional statement. You'll find it helps with troubleshooting to limit where a variable is modified.

cribbageman2500 · May 10th, 2008, 3:45 PM

from what I've seen though an array has to be a fixed length, thereby it cannot be made flexible enough to accept any # of "rolls", as defined by a variable.

Freaky Chris · May 10th, 2008, 3:50 PM

If thats the case then Check out ArrayLists and or Vectors, these are used as arrays but are classes, best of all you do not have to specify a size for them. You can add and delete entries as you please.

Chris

Fall Back Son · May 12th, 2008, 12:01 AM

Use ArrayList. Their use is simple. At the top, import java.util.*;

and an ArrayList works like an array, except that it has methods to help you. Google Java Sun ArrayList and read their method descriptions. For example, the add method will allow you to continue adding to a list in order to make it larger dynamically.

cribbageman2500 · May 13th, 2008, 3:57 PM

Awesome sauce, I'll look into it more after finals week is over, and I'll get back to you guys with my progress.

Thank you all again,
Cribbageman

May 9th, 2008, 8:38 PM	#1
cribbageman2500 Newbie Join Date: Apr 2008 Posts: 8 Rep Power: 0	Ten sided die simulator. Hello everyone! This is the first time I have really tried to program, so I'd like to apologize in advance if the code I'm about to present is god-awful. Here's the basic idea, A certain # of 10 sided dice (w/ values 1-10) will be rolled, if the resulting number on any die is above a certain threshold it will be recorded and if it above another threshold then it will be recorded, and "rolled" again. For example If I instructed it to roll 5 dice with a threshold of 8 and a repeat of 10 and the results were: 1,3,7,10,8 the program would tally the 2 successes and "roll" the ten again resulting in a 9, there would then be 3 successes and the program would end and output the tally to a text area. So far I have an almost functional program, the current issue is that it will only allow the generation of one # at a time. If more then one "roll" is requested, or it hits the again threshold when rolling 1 die it will run forever. Just so you know I'm implementing it into a GUI, but for simplicity's sake I'll leave that code out. And if it matters I'm working in the Net Beans IDE. java Syntax (Toggle Plain Text) import java.util.; import javax.swing.; public class D10sim extends javax.swing.JFrame { private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { int gen, tally, num1; double dice = Double.parseDouble(jTextField1.getText()); double thresh = Double.parseDouble(jTextField2.getText()); double again = Double.parseDouble(jTextField3.getText()); gen = 0; tally = 0; {num1 = (int) ((Math.random() * 10) + 1); while (gen<dice) {if (num1>=again) {dice ++; tally ++; gen ++;} else if (num1>=thresh) {tally ++; gen ++;} else if (num1<thresh) {gen ++;} jTextArea1.setText(String.valueOf(tally)); } } } import java.util.; import javax.swing.; public class D10sim extends javax.swing.JFrame { private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { int gen, tally, num1; double dice = Double.parseDouble(jTextField1.getText()); double thresh = Double.parseDouble(jTextField2.getText()); double again = Double.parseDouble(jTextField3.getText()); gen = 0; tally = 0; {num1 = (int) ((Math.random() * 10) + 1); while (gen<dice) {if (num1>=again) {dice ++; tally ++; gen ++;} else if (num1>=thresh) {tally ++; gen ++;} else if (num1<thresh) {gen ++;} jTextArea1.setText(String.valueOf(tally)); } } } Thank you in advance you your help, any advice is much appreciated.

May 10th, 2008, 3:45 PM	#3
cribbageman2500 Newbie Join Date: Apr 2008 Posts: 8 Rep Power: 0	Re: Ten sided die simulator. from what I've seen though an array has to be a fixed length, thereby it cannot be made flexible enough to accept any # of "rolls", as defined by a variable.

May 10th, 2008, 3:50 PM	#4
Freaky Chris Hobbyist Programmer Join Date: Dec 2007 Location: England Posts: 169 Rep Power: 1	Re: Ten sided die simulator. If thats the case then Check out ArrayLists and or Vectors, these are used as arrays but are classes, best of all you do not have to specify a size for them. You can add and delete entries as you please. Chris __________________ Who said i couldn't program `sarcasm = raw_input('Type in a sarcastic remark: ') print sarcasm`

May 12th, 2008, 12:01 AM	#5
Fall Back Son Hobbyist Programmer Join Date: Oct 2006 Posts: 203 Rep Power: 2	Re: Ten sided die simulator. Use ArrayList. Their use is simple. At the top, import java.util.*; and an ArrayList works like an array, except that it has methods to help you. Google Java Sun ArrayList and read their method descriptions. For example, the add method will allow you to continue adding to a list in order to make it larger dynamically.

May 13th, 2008, 3:57 PM	#6
cribbageman2500 Newbie Join Date: Apr 2008 Posts: 8 Rep Power: 0	Re: Ten sided die simulator. Awesome sauce, I'll look into it more after finals week is over, and I'll get back to you guys with my progress. Thank you all again, Cribbageman

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Programming Forums > Application Development > Java

Ten sided die simulator.