C program to simulate a dice throw

Posted on 22.01.2021 Comments

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Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. This is probably a stupid question, but I'm really struggling with this concept. I'm going through a tutorial explaining about arrays and the rand function. I have two problems. The first is, obviously to simulate one dice we need to randomly generate a number from The book suggests this:. Right, well rand can generate any number from We then find the remainder of this number when it's divided by 6, then add 1.

We divide it by 6, giving Unless I'm going mad, that makes 9, which is not between The program runs fine however and I just can't understand how we get a number from using that code! Any help would be greatly appreciated. The second problem I have isn't really as major, but is relevant. The book left out what this bit of code means:. All that is mentioned is that srand initialises a random number generator using the seed provided by clock. Right, now can we actually input anything into clockif so what is its effect?

Just a little explanation of what srand clock does would be perfect. Sorry for the long post, I hope you don't mind the wall'o'text. Any help would be really appreciated. Got it!

c program to simulate a dice throw

I was under the impression that the remainder meant the decimal. Now that I've written it out, I see how stupid I've been. Glad my A-level maths counts for something Thanks again! You are confused between integer truncation and remainders. When you divide by 6 using integer math the remainder is 5 or 0.Mar 7, at pm UTC. You can mimic a dice roll by generating a random number between 1 and 6. This is done by calling the function "rand ".

Last edited on Mar 7, at pm UTC. Mar 8, at am UTC. JLBorges: Would it be possible to explain the difference in what you do versus the "easy" way? Let us say, we need a number in the interval [ 0, N ] for some N. Even though the sequence of integers generated may be statistically random, the sequence of the least significant four bits may not be all that random.

Last edited on Mar 8, at am UTC. Mar 8, at pm UTC.

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JLBorges: Just the meaning was enough, thanks! I'm not sure I see the problem though. If we generate a unform random number between [0,[, the odds of the last digit being 1 are equal to the odds of the last digit being 6 or any other digit, obviously.

Python Game : Rolling the dice

The only state maintained by the random number generator is a single integral value and because of that the implementations use a Linear Congruential Generator.

The low-order bits of LCGs when m is a power of 2 should never be relied on for any degree of randomness whatsoever. Almost all implementations of std::rand use a modulus which is a power of two - typically 2 32 as can be seen from the table.

c program to simulate a dice throw

The Microsoft implementation doesn't give one a chance to use the lower order bits - it discards them entirely before returning a value to the user. A better pseudo random number generator like std::mt would be a lot closer to your expectations. Mar 9, at am UTC. A further problem of LCGs is that the lower-order bits of the generated sequence have a far shorter period than the sequence as a whole if m is set to a power of Remember Me? Thread: Dice Roll Program. Dice Roll Program.

53 Simple Dice Game

I need to simulate a dice rolling program in plain C that rolls 10 times and then reports what the highest and lowest roll was I've written a program to generate the two die but it will only run once.

I tried a while statement while numberRolls! Please help! I have an idea on how to get the highest and lowest roll but any help would be appreciated! Please show code. Here is my code so far Your logic is all wonky. You initialize numberRolls to 10, then only perform what's in the while loop if numberRolls is not Since this isn't the case, you do nothing.

Generally a loop to do something x number of times looks something like this: Code:. Thank you for the advice about the for statement That's exactly why I couldn't get it to print more than once.

The problem is now that it rolls ten times, it rolls the same exact two numbers each time. I'm also wanting to incorporate something that tells you your highest and lowest roll. I thought about trying min and max but not sure if that's what I need.

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Replies: 19 Last Post:PM. Dice program getting 0s By domezy in forum C Programming. Replies: 4 Last Post:AM. Need help with my program By Noah in forum C Programming. Replies: 2 Last Post:PM. Replies: 8 Last Post:PM.

My program, anyhelp By licomb in forum C Programming. Replies: 14 Last Post:PM. All times are GMT The time now is AM.If you ever had to simulate random outcomes in excel sheet, you might have already heard of about the spreadsheet function randthis little function generates a random fraction between 0 and 1 whenever you use it.

Of course, if you have analysis tool pack installed like I do, then we can use randbetween 0,12 to do the same. But that is not what happens when you throw a dice, you see an awful lot more 5,6,7,8 than you see a perfect 12 or 2.

Update: Thanks to Jon for pointing out that round is not the choice if you want random integers, you should use int instead. See his explanation in the comments and the illustration here. I have used this logic to simulate monopoly board game and prove that it is not really that random. Simple, fun and useful emails, once per week. Thank you so much for visiting. I do this by sharing videos, tips, examples and downloads on this website. FREE Goodies for you From simple to complex, there is a formula for every occasion.

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Go ahead and find them. Share your solutions, clues or struggles in the comments box. You have an interesting point, but the bell curve theory is nonsense. Certainly it is not what you would want, even if it were true.

Alpha Bravo - Although not a distribution curve in the strict sense, is does reflect the actual results of throwing two physical dice. And reflects the following. There is 1 way of throwing a total of 2 There are 2 ways of throwing a total of 3 There are 3 ways of throwing a total of 4 There are 4 ways of throwing a total of 5 There are 5 ways of throwing a total of 6 There are 6 ways of throwing a total of 7 There are 5 ways of throwing a total of 8 There are 4 ways of throwing a total of 9 There are 3 ways of throwing a total of 10 There are 2 ways of throwing a total of 11 There is 1 way of throwing a total of I am afraid the distribution shown in the right graph is what you get when you throw a pair of dice in real world.

As Karl already explained, it is not random behavior you see when you try to combine 2 random events individual dice throwsbut more of order due to how things work.

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Otherwise, the rounding causes half of each number's predictions to be applied to the next higher number. Also, you'd get a count for 7, which isn't possible in a die. To illustrate, I set up trials of each formula in a worksheet and counted the results.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am a beginner programer, and I have to create a program that simulates rolling a dice times, and then tells the user how many times they rolled each number. The hard part is, I have to do it using only two variables. The problem is, I can't get the program to pick more than one random number, it will just repeat the same number times.

Also, as you can see, I have no idea how to write this program with only two variables, but I think it may have something to do with lists. Your immediate problem is that you get a random value once before the loop starts, and then use that single value each time through the loop.

To fix this, the call to random. Secondly, the call as you have it will give you numbers between one and seven inclusive which, unless you're using some weird Dungeons and Dragons style dice, is probably not what you want. You should be generating numbers from one to six inclusive or, as per below with the arrays, zero through five.

Thirdly, if you're limited to two variables, it's almost a guarantee that you'll use those up with a loop counter and an array of count values, leaving nothing left over for the dice throw and individual count variables. If this is classwork, I urge you to stop reading now and implement your own solution based on that. If it's not classwork, or your ethics aren't as strong as they could be athe Python code below shows one way of doing it, keeping in mind that Python arrays are zero-based rather than one-based:.

Learn more. Program that simulates rolling a dice, and tells you how many times you roll each number Ask Question. Asked 5 years, 4 months ago. Active 5 years, 4 months ago. Viewed 5k times.

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Are you allowed to combine values in a single variable, e. Were you asked to simulate a seven-faced dice? In what Bizarro universe can the variables count1 through count6 not push you over the two-variable limit?By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. You will ask the user for the number of rolls to simulate. You will then roll two dice per roll. Use the random library and the randint function therein random.

Print out each dice count, the number of rolls for that dice count, and the percentage of the total:. This is not even close to looking like what the sample output says I should have. What am I doing wrong? There are 4 changes required to make your code work other than the minor typos already mentioned in the comments :. Thirdlywhen calculating the percentage of total for the number of doubles, you have forgotten to divide by count.

So, it should be:. Fourthlythe line where you print the number of doubles needs to be put outside the for statement because you only want to print it once; not on every iteration of the for statement :.

Your problem was that you were only adding one to the sum if there were doubles, which was why you only had results for even rolls. Learn more. Rolling two dice and tabulating outcomes Ask Question. Asked 5 years, 11 months ago. Active 1 year, 6 months ago.

Viewed 17k times. Here's the problem: You will write a program to simulate the rolling of a pair of dice. Print out each dice count, the number of rolls for that dice count, and the percentage of the total: Sample Output Enter the number of rolls: 2 - 2.

Can anyone tell me why? I keep getting ValueError messages. Paul Kjc Kjc 79 1 1 gold badge 1 1 silver badge 9 9 bronze badges.

c program to simulate a dice throw

Where is the ValueError raised? Also, the call to main would raise a NameError unless you have actually defined it. Active Oldest Votes.

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Even with that fix, still gives me the same format of results, although with different numbers due to the random library. Printing the number of doubles should not be in the for statement ; you only want to print it once, at the end; not in every iteration of the for statement.Sign in to comment.

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c program to simulate a dice throw

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You may receive emails, depending on your notification preferences. Aaron on 10 Mar Vote 0. I have to write a script that uses the user input to roll a certain amount of dice, with a certain amount of sides, with a certain amount of rollsand a certain amount of trials. I have the whole user input part down, but I'm having trouble writing a function for rolling the dice.

How do I write the code so that I can factor in the amount of trials and rolls? I know I probably have to do something with for loops, but I'm very confused and I can't think of anything at the moment.

Oleg Komarov on 10 Mar Cancel Copy to Clipboard. Does R change across dice?

How Do I Roll Dice in C#?

Answers 1. Vote 5. Each slice on the third dimension is a trial. Each column is a dice rolled 3 times. See Also. Tags matlab dice simualtion rolling random probability. Opportunities for recent engineering grads.