dev-cpp-users Mailing List for Dev-C++

Hi Erika,
 
There's lots of random number generators in C and C++.  A good place to start is Google for 'diehard random number generator C++'.  It's a good start as any RNG that can pass the Diehard tests is a good RNG.
 
See Description of the Rand Function in Excel 2003 and Diehard Battery of Tests of Randomness.  On the second link, download the zip file for Windows Software (732KB), http://www.cs.hku.hk/~diehard/cdrom/diehard.zip.  After extracting, open make.txt, which has numerous RNG examples.
 
I know this as I've been working recently on analyzing the capability of the C++ library rand() call.  It totally sucks!  In the alternative, I'm using something like the following, which is however, slow, and I'm looking for a faster version myself that doesn't use floating point!
 
#define TWORAISED16 65536
unsigned int secure_random ( void ) {
/* This method implements a more secure random number generator using the Wichman
   and Hill procedure.  An unsigned integer is returned.
   Alfred P. Reaud, 05/01/05 12:04
   VERIFIED: 05/01/05 12:48
*/
int ix = 0;
int iy = 0;
int iz = 0;
double result = 0;
double rand_f = 0;
double i_part = 0;
 // Create 3 random numbers.
    ix = (171 * rand()) % 30269;
    iy = (172 * rand()) % 30307;
    iz = (170 * rand()) % 30323;
    // Sum them as a double.
    result = ((double)ix / 30269.0) + ((double)iy / 30307.0) + ((double)iz / 30323.0);
    // Make a random number that will be 16 bits wide.
    rand_f = modf(result, &i_part) * TWORAISED16;
    result = modf(rand_f, &i_part);
    return ((unsigned int)i_part) % TWORAISED16;
}

Erika Brattich <eri...@st...> wrote:


Hi everybody,
does anybody where to find a random generator for C++(the function rand() in 
the library stdlib is not what I need)?
I'm a beginner in the field of programming and I try to read some programs and 
to correct them in order to learn... Could you suggest me some sites where I 
can find good, but not tooo difficult, programs working on Dev C++?
Thank you very much!!!





Alfred P. Reaud
 

http://esotic.com/media/EsoticDevDots.zip

The zip contains the modded sample FF project and the compiled
FFDots.dll along with a FFDots.bmp icon for use in the \TZT\SysData
directory (FreeFrame apps can ignore it).  The DLL was compiled with
DevCPP (using MMX and other relevant optimizations).

FFDots supports two input videos but TZT doesn't use ProcessFrameCopy
yet, so could somebody please test that functionality and let me know if
it works correctly?

The effector is 16bit only and will work with ProcessFrame which uses
black for the second layer (works well with chromakey).  There is one
input parameter that changes the mask shape.  There is some potential
for differently sized and shaped masks and other bit-depths (so feel
free to get in there and hack about in the source).  I may update the
source to support 24 and 32 bit unless someone beats me to it.

The Dots effector in TZT tends to be rather fast, and may be equally
speedy in FreeFrame apps.

-Dave/Esotic

Yes, yo can do this conversion

#include <stdio.h>
#include <stdlib.h>
main(){
    printf("%d -> %c\n",'A','A');
    system("pause");
    return;
}


Ruben Savia
Ingeniero Electr=F3nico
Datacom Services
eBD - eBusiness Division
Alcatel de Argentina S.A.

e-mail : rub...@al...=20

Phone:    5411 4349 - 1111 ext.1001
Fax:         5411 4349 - 1199
Alcanet  : 2930-1001
Web site: www.ind.alcatel.com=20

Hi everybody,
does anybody where to find a random generator for C++(the function rand()=
 in=20
the library stdlib is not what I need)?
I'm a beginner in the field of programming and I try to read some program=
s and=20
to correct them in order to learn... Could you suggest me some sites wher=
e I=20
can find good, but not tooo difficult, programs working on Dev C++?
Thank you very much!!!

If I understand you correctly, then all you need to do is this:

int i = 65;
char c = i;
// Then as proof...
printf("%c, %d\n",c,c);
printf("%c, %d\n",i,i);

Hope this is what you meant.

-Lukas

On Mon, 24 Jan 2005 15:24:34 -0800 (PST), Jason Benjamin
<red...@ya...> wrote:
> I'm able to convert a character into its corresponding
> ASCII code, but what if I want to do it the other way
> around?  What is the method for that if there is one?
> 
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Works for me....


-------Original Message-------
> From: "Guillermo Gutierrez" <ggu...@ma...>
> Subject: [Dev-C++] www.devpaks.org
> Sent: Jan 24 2005 13:20:58
>
>  _Is anyone else having trouble connecting to devpaks.org?_
>  _It seems to be down._
>  
>  _GUILLERMO GUTIERREZ_
>  _MARKET SCAN INFORMATION SYSTEMS_
>  _SOFTWARE Q.A. SUPERVISOR_
>  _(818) 575-2000 X2427_
>  GGUTIERREZ@MARKETSCAN.COM__
-------Original Message-------

Hi,
I have a problem with storing a bitmap.
I whant to store a bitmap to the exe file and when starting the exe I whant to load this recaorce 
bitmap to memory and get a HDC pointer to it !!!
How can I do this ???

thx, Acki