Dice simulation java program

Nick Cantara wrote: Not sure about this last one, but the program should have a class called Die that stores the data for each die. This is what I have so far and I'm lost on it There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors.


Forum: Beginning Java. Roll the Dice program. Nick Cantara. So I'm writing an application that rolls two six-sided dice, displaying the results after each roll and asking the user if they would like to roll again. It is supposed to show Roll 1, Roll 2, Roll 3, etc, but I am having problems with it showing that based on my counter variable.

I have 5 classes created.

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Below is what I have for code so far. This is what I have so far and I'm lost on it. Jeff Verdegan.

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I like Hi, and welcome to the Ranch! Wha specific problem are you having?

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Also, that's a lot of code, and the vast majority of it is not related to your problem. It will be easier for people to help you and easier for you to help yourself! Winston Gutkowski. Right, well I'm assuming your Die class is supposed to model a single die, so why would you have a ' sum ' field? Also, it would appear that you're using the ' d ' field to hold the number of sides, so why not call it ' numberOfSides '?

Giving things meaningful names is a very important part of good programming. If it's the random number stuff you're stuck on, have a look at the Random class java. You are writing too much code at once. Before you ever write a single line of code, you should analyze the problem and come up with all the individual things you need it to do.

dice simulation java program

For example, my first pass at this assignment would be: 1 Generate an integer in the range 2 compute the sum of two numbers 3 Display a result 4 keep track of the number of rolls 5 ask the user something 6 Get input from a user 7 validate input 8 loop around and do it all again if needed I'd make sure I could do each of the above steps by them selves before trying to combine them.

I'd make sure one worked before I considered starting the next.

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Boost this thread! Beginner Yahtzee Progam.Some of the very first programs we are introduced to in programming is the idea of random numbers. This is often introduced using the idea of the die or dice. We have all seen them and have probably even thrown a set of dice at some point in our life.

A die is pretty much a representation of a random number generator with a fixed range of values. Feel free to take this code and do what you like with it. The class will start by having some private internal variables to keep track of state as related to the number of faces we tell the Die it has. By default we will assume we have a 6 faced die, but you could easily add more or less as required by specifying the number of sides in the constructor.

We will first explore the class using some Java. Each time a roll is done, its private value is set and that particular roll value is incremented in this history array. The class offers a set of properties for getting the current value of the roll using getValuethe number of sides using getSidesthe count for any side rolled using getHistoryValue int side and a resetHistory function for resetting all the history values.

We also setup a method to get a string containing a histogram so we can then print it as we see fit. The class is pretty straight forward and easy to use in various ways.

One way we can use this is to setup a die instance, call its roll method and then interrogate the instance for data it has seen. Create one die, roll it five times or create five dice and roll them all once. It is up to you. You can even mix and match dice types by creating 3 instances with 4 faces and 2 with 8 faces.

Here we can see a lot of the similarities to the Java version of the class. Again we use a StringBuilder class to make the string building process a little more efficient for larger data sets and format it to be presentable.

Below is the same example done in PHP. PHP accesses its members through the arrow functionality as well as all their variables being prefixed with dollar signs and no strong typing.

If we are using PHP 7 we could introduce a little bit stronger typing hints and such if so desired. But the use of the class is the same as the others. We can use this class relatively easily.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews.

It only takes a minute to sign up. The program should output x, which is the number of times 6n dice are rolled before they show an equal number of all values. For example, if n is 1, then x will be the number of times you need to roll 6 dice before you get a 1, 2, 3, 4, 5 and 6.

dice simulation java program

The output number x will be variable because it is subject to chance. Do multiple experiments to find a stable average value for x. You initialize the dice array each iteration. If the setRoll adjusts the roll, then you can re-use the array, and initialize it outsize the main for loop. You have some comments which don't tell the reader anything they didn't already know: creates an array of 6 dicecreates a scannerfills each slot with dice. You can assume that the reader will be at least somewhat familiar with the language itself.

Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Monte Carlo dice [closed] Ask Question. Asked 5 years, 5 months ago. Active 5 years, 5 months ago.

Viewed times. The user inputs a number n which determines the number of groups of 6 dice to be rolled.

On average, this value is around Heslacher It would also be easier if it were more consistently formatted. As a general rule, you should either use spaces or use tabs, not both at once. You should give the results of your testing, as it looks like your program has a bug. You should probably get it working before asking for a review. Active Oldest Votes. Add comments to tell WHY you are doing thing in your code what is the role of n? I would make a method that checks if the dice[] are all equal You initialize the dice array each iteration.

If the setRoll adjusts the roll, then you can re-use the array, and initialize it outsize the main for loop And you should check the dice only after rolling them all RobAu RobAu 2, 10 10 silver badges 21 21 bronze badges. What you should comment on is why you do things, and if it is unclear, what. The Overflow Blog. Socializing with co-workers while social distancing. Podcast Programming tutorials can be a real drag.Dice, dice, lets play nice!

Ready to roll for that winning number? You might as well test it out yourself or create you own dice simulation in java!

Basically a simple simulation based off an analysis of random number in occuring trials or events. If you ever wondered how random dice games worked now is your lucky day. Below I created a small Java application that can mimic dice rolling simulation. It will also show you the results and you may modify the code to your own fitting. Be sure to give me credit if you do use it please. Giving credit is a good practice, especially if it's more than ten lines of code.

In this program, the user can create objects of class dice, and specify their names. I was going to add the numbers of side, but you can edit the variables so that you can roll die of different numbers!

Below will be the code and a quick explanation followed by some screenshots. Here I ran two simulations to show how the performance is with many trials in the program. As you can see in this simulation we were unable to get a five streak roll of 7.

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However, out of the rolls, we got 16 sevens and the average to get a 7 was 5. For the second simulation, we increase the number of rolls! As you can see in this simulation we were able to get a five streak roll of 7, 13 times.

However, out of therolls, we got 16, sevens and the average to get a 7 was about 5 rolls. That's it for this tutorial! I may or may not continue creating java tutorials, because I'm actually more of a C kind of guy despite there being not much tutorial on the language here, haha! If you have a question or a thought please leave a comment.

Our Games. Computer Science. Anime Treasury. Technology Feed. Account Menu. Info: Welcome! View Comments.Given n dice each with m faces, numbered from 1 to m, find the number of ways to get sum X.

X is the summation of values on each face when all the dice are thrown. The Naive approach is to find all the possible combinations of values from n dice and keep on counting the results that sum to X.

dice simulation java program

Why DP approach? The above problem exhibits overlapping subproblems. See the below diagram. Also, see this recursive implementation. Let there be 3 dice, each with 6 faces and we need to find the number of ways to get sum Please take a closer look at the above recursion.

Hence, storing the results of the solved sub-problems saves time. Following is implementation of Dynamic Programming approach. We can add the following two conditions at the beginning of findWays to improve performance of the program for extreme cases x is too high or x is too low. This article is compiled by Aashish Barnwal. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

Writing code in comment? Please use ide.


Dice Throw DP Optimal Strategy for a Game DP Minimum increment or decrement operations required to make the array sorted Count of subsets with sum equal to X Split the given string into Primes : Digit DP Count of numbers in range which are divisible by M and have digit D at odd places Count number of ways to arrange first N numbers Median of sliding window in an array Eggs dropping puzzle Set 2 Minimum increment or decrement required to sort the array Top-down Approach Find the numbers from 1 to N that contains exactly k non-zero digits Maximum sum path in a Matrix Maximum size of square such that all submatrices of that size have sum less than K Count maximum occurrence of subsequence in string such that indices in subsequence is in A.

One extra. The entries in 0th row and 0th column. One extra row and column are used for simplicity. Number of dice is directly used as row index and sum is directly used as column index.

The entries in 0th row and 0th column are never used. Python3 program to find the number of ways to get sum 'x' with 'n' dice. The main function that returns number of ways to get sum 'x'.

Rolling Dice in Java, C# and PHP

Create a table to store results of subproblems. Fill rest of the entries in table using recursive relation. Uncomment above line to see content of table. This code is contributed by MaheshwariPiyush. The entries in 0th. WriteLine findWays 4, 2, 1. WriteLine findWays 2, 2, 3 .During these challenging times, we guarantee we will work tirelessly to support you.

We will continue to give you accurate and timely information throughout the crisis, and we will deliver on our mission — to help everyone in the world learn how to do anything — no matter what.

Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities. We will get through this together. The Random class in java can be very helpful for performing simulations and creating games.

A basic way to use this class is to simulate a dice, which means getting a random number from a certain range depending on how many sides the dice contains. Log in Facebook Loading Google Loading Civic Loading No account yet? Create an account. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. As the COVID situation develops, our hearts ache as we think about all the people around the world that are affected by the pandemic Read morebut we are also encouraged by the stories of our readers finding help through our site.

Article Edit. Learn why people trust wikiHow. Author Info Updated: March 11, To create this article, volunteer authors worked to edit and improve it over time. This article has also been viewed 8, times.

Learn more Explore this Article Steps. Tips and Warnings. Related Articles. Create a new project. Name it DiceSimulator. If it makes a main class automatically, call that class DiceTester. Create a new class and name it Dice. In this Dice file, import the random package: import java.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

dice simulation java program

Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. I've written a basic dice program in Java which takes a number of faces then randomly selects a number within that boundary. Here is the code:. In your code you have declared a variable dice which is a Random.

This is an indication that you have a mismatch between the object and the implementation. The fact that you call it 'dice' implies you want something that is a Dice A Dice should be able to "encapsulate" itself.

Now you have a class that represents a dice, and you can roll that dice, and you now have a main method that looks like:. Note, there's always going to be a discussion about the singular is "Die", and the plural is "Dice". One Die, many Dice Creating a class called "Die" is just wrong.

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Unlike in C, in Java people usually declare the variables when they actuall need them; for example:. Sign up to join this community. The best answers are voted up and rise to the top.

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Java Dice Roller Ask Question. Asked 4 years, 6 months ago. Active 4 years, 6 months ago. Viewed 15k times.

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