Re: [fpc-pascal]Random generator

2003-12-06 Thread Alan Mead
My version of Linux includes a /dev/random. Is there any way to use this to get better random sequences. When I cat this device, it looks like it runs out of data pretty quickly, but I bet it would make a series of fairly random seeds... -Alan --- jordi <[EMAIL PROTECTED]> wrote: > El ds, 06 de

Re: [fpc-pascal]Random generator

2003-12-06 Thread jordi
El ds, 06 de 12 de 2003 a las 21:06, Jonas Maebe escribió: > As long as you use pseudo-random number generators, you will not be > able to generate sequences that are very hard to redo. They are per > definition easy to reproduce, even if you mix 100 different sequences. > If you want to encryp

Re: [fpc-pascal]Random generator

2003-12-06 Thread Jonas Maebe
On 6 dec 2003, at 21:01, jordi wrote: You mean you want to write something like the "first" random number of 100 "different sequences"? Yes, I'd like something like this. A sequence of numbers very difficult (imposible) to re-do. As long as you use pseudo-random number generators, you will not be

Re: [fpc-pascal]Random generator

2003-12-06 Thread jordi
El ds, 06 de 12 de 2003 a las 20:40, Jonas Maebe escribió: > > You mean you want to write something like the "first" random number of > 100 "different sequences"? > Yes, I'd like something like this. A sequence of numbers very difficult (imposible) to re-do. Thanks, for your help.You are very

Re: [fpc-pascal]Random generator

2003-12-06 Thread Jonas Maebe
On 6 dec 2003, at 20:26, jordi wrote: Randomize initialises the random number generator based on the current system time. So if you call it multiple times in a short time period, you will get a similar (or even the same) randseed. With this, you have answered perfectly my question, to get a difere

Re: [fpc-pascal]Random generator

2003-12-06 Thread jordi
El ds, 06 de 12 de 2003 a las 19:31, Jonas Maebe escribió: > > You are using random/randomize wrong here. The correct way is > > randomize; > for loop := 1 to 100 do begin >writeln (random (1000) +1); > end; > I know that this is the correct way, mine was only one bad example to re-seed. >

Re: [fpc-pascal]Random generator

2003-12-06 Thread Jonas Maebe
On 6 dec 2003, at 19:16, jordi wrote: Sorry, there are a few things that I don't understand... and I am not so good in mathematics... and I can't explain it in English quite well. The same seed generates the same random sequence... or not? Yes. and why I can randomize as often as I want in the

Re: [fpc-pascal]Random generator

2003-12-06 Thread jordi
El ds, 06 de 12 de 2003 a las 18:34, Jonas Maebe escribió: > > The built-in random of 1.0.x is one of the best random generators you > can find (although it's very slow). How is it not safe? The one in > 1.9.x is a little worse, but it's three times faster (it's the Mersenne > twister). > >

Re: [fpc-pascal]Random generator

2003-12-06 Thread Preben Mikael Bohn
jordi wrote: Hi, I'm looking for a good random generator. Randomize and Random does not seem safe enougth. Can someone help? Hi Jordi, in what sense is it not safe enough? If you really need something "safe", only a hardware solution is probably good enough. Best regards Preben _

Re: [fpc-pascal]Random generator

2003-12-06 Thread Jonas Maebe
On 6 dec 2003, at 18:18, jordi wrote: Hi, I'm looking for a good random generator. Randomize and Random does not seem safe enougth. Can someone help? The built-in random of 1.0.x is one of the best random generators you can find (although it's very slow). How is it not safe? The one in 1.9.x is

[fpc-pascal]Random generator

2003-12-06 Thread jordi
Hi, I'm looking for a good random generator. Randomize and Random does not seem safe enougth. Can someone help? Thanks. Jordi. (Please, use the list if you can answer, otherwise I won't receive it) ___ fpc-pascal maillist - [EMAIL PROTECTED] ht