Jump to content
  • Advertisement
Sign in to follow this  
phil67rpg

random numbers

This topic is 2036 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I am trying to generate 9 random numbers that do not repeat. here is the code I am using.

srand(
 
unsigned(time(NULL)));
 
 
 
int x=0;
 
 
 
vector <int> Num_Array;
 
 
for(int i=1; i<=9; i++)
{
Num_Array.push_back(i);
}
random_shuffle(Num_Array.begin(),Num_Array.end());
player_O=Num_Array[x];
x++;

I am attempting to do some AI for a tic tac toe game.

Share this post


Link to post
Share on other sites
Advertisement

I am doing what you suggested .




Posted Today, 04:35 PM


What's the question?

how do I generate 9 random numbers that do not repeat?

Share this post


Link to post
Share on other sites

use not Num_Array.push_back(i); but something like Num_Array.push_back(rand());

This fails the requirement, because it's possible that rand() will return the same number at least twice in the nine calls.

The only true way to do it is to shuffle the possible values, like shuffling a deck of cards, rather than randomly picking a card from a huge pile and hoping there are no duplicates.

I am doing what you suggested .






Posted Today, 04:35 PM


What's the question?

how do I generate 9 random numbers that do not repeat?
It looks like you did. Try telling us what you expected to happen, and what actually happened, and be as specific as possible. Edited by Ectara

Share this post


Link to post
Share on other sites

well thanks for all the help but I will take a long hard look at my game code and see what is wrong and correct it.

Share this post


Link to post
Share on other sites

well thanks for all the help but I will take a long hard look at my game code and see what is wrong and correct it.

 

...

 

Taking a "long hard look" won't help. You need to:

1. figure out what you want the code to do

2. verify it does what it you want it to

3. debug it to see why it doesn't

 

I think you got step 2 down. I am not sure you have done step 1. And step 3 can't be done without step 1. Before fixing your problem, you need to know what the problem is.

Share this post


Link to post
Share on other sites

I am more than willing to help, as I'm sure many of us are, but I can't see how the code that you posted doesn't meet the goal that you mentioned; I don't see anything wrong. This either means that there is a problem elsewhere that is causing unexpected results, or I don't know what your goal really is.

 

Start with making sure that I understand your goal, and I can devote as much time as you need in finding the solution. It looks as if it correctly generates a randomized vector of numbers 1 through 9, so either later on it isn't using these numbers properly, or you are looking for more than a randomized vector of numbers. Any hint would be helpful.

Share this post


Link to post
Share on other sites

well thanks for all the help but I will take a long hard look at my game code and see what is wrong and correct it.

 

Phil, I salute you.  You troll better than anyone I've met.  Congrats.

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

GameDev.net is your game development community. Create an account for your GameDev Portfolio and participate in the largest developer community in the games industry.

Sign me up!