| |
by: Jason |
last post by:
Hi,
I need a way to use random numbers in c++. In my c++ project, when using
the mingw compiler I used a mersenne twister that is publicly available and
this did its job well. Now I have shelled out on VC++ 6.0 compiling that
same code is proving difficult. I am not too worried how I generate random
numbers in c++, as long as it is sufficiently random.
Can anybody help me out in getting what I want from VC++?
|
by: Martin |
last post by:
I am trying to write code that selects a random number in the range 0 to n,
where n can be substantially greater than the RAND_MAX on my system which is
32767. I am using VC++ 2003 FWIW.
As you know, the standard library rand() only returns an integer in the
range 0<=n<=RAND_MAX.
In fact, this problem is posed as an exercise by Andrew Koening in
Accelerated C++. It's Ex 7-9 and it's marked as "difficult" so I don't feel
too bad in asking...
|
by: Jack |
last post by:
I have two files:
sort_comparison.c++
my_sort.h
sort_comparison.c++ calls this code in my_sort.h:
void my_sort::fillArray(int arr,int n)
{
// const int random_number_range=1000000;
|
by: Ben Pfaff |
last post by:
One issue that comes up fairly often around here is the poor
quality of the pseudo-random number generators supplied with many
C implementations. As a result, we have to recommend things like
using the high-order bits returned by rand() instead of the
low-order bits, avoiding using rand() for anything that wants
decently random numbers, not using rand() if you want more than
approx. UINT_MAX total different sequences, and so on.
So I...
|
by: Peteroid |
last post by:
I know how to use rand() to generate random POSITIVE-INTEGER numbers.
But, I'd like to generate a random DOUBLE number in the range of 0.0 to 1.0
with resolution of a double (i.e., every possible double value in the range
could come up with equal probability). I'd also like to be able to seed this
generator (e.g., via the clock) so that the same sequence of random values
don't come up every time.
Anybody have an easy and fast...
|
| |
by: fieldfallow |
last post by:
Hello all,
Is there a function in the standard C library which returns a prime
number which is also pseudo-random?
Assuming there isn't, as it appears from the docs that I have, is there
a better way than to fill an array of range 0... RAND_MAX with
pre-computed primes and using the output of rand() to index into it to
extract a random prime.
|
by: Pascal |
last post by:
hello and soory for my english
here is the query :"how to split a string in a random way"
I try my first shot in vb 2005 express and would like to split a number in
several pieces in a random way without success.
for example if the number is 123 456 : i would like to have some random
strings like theese :
(12 * 10 000) + (345 * 10) + (6*1)
or
(123*1 000)+(4*100)+(5*10)+(6*1)
etc...
|
by: Peter Oliphant |
last post by:
I would like to be able to create a random number generator that produces
evenly distributed random numbers up to given number.
For example, I would like to pick a random number less than 100000, or
between 0 and 99999 (inclusive).
Further, the I want the range to be a variable. Concretely, I would like to
create the following method:
unsigned long Random( unsigned long num )
|
by: urkel |
last post by:
Hello everybody,
I have these errors on C program that may be because of random number definition. I use an SSH to compile C like in Linux. May be you have idea whether the errors are due to the random number generators in my program do not match those available from libraries in the SSH. My C program uses these libraries
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<assert.h>
#include<fftw3.h>
// These are the...
|
by: jason.cipriani |
last post by:
I am looking for a random number generator implementation with the
following requirements:
- Thread-safe, re-entrant.
- Produces consistently reproducible sequences of psuedo-random
numbers given a seed.
- Relatively uniform, does not have to be perfect.
The application is not a security or statistics application, the
quality of numbers is not a priority although a fairly uniform
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
| |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
| |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
|
