A Discrete-Event Network Simulator
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sample-random-variable-stream.cc
Go to the documentation of this file.
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/*
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* Copyright (c) 2012 University of Washington
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#include "ns3/command-line.h"
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#include "ns3/nstime.h"
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#include "ns3/random-variable-stream.h"
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#include "ns3/simulator.h"
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#include <iostream>
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/**
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* \file
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* \ingroup core-examples
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* \ingroup randomvariable
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* Example program illustrating use of ns3::RandomVariableStream
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*
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* This program can be run from ns3 such as
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* `./ns3 run sample-random-variable-stream`
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*
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* This program is about as simple as possible to display the use of ns-3
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* to generate random numbers. By default, the uniform random variate that
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* will be printed is 0.816532. Because ns-3 uses a fixed seed for the
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* pseudo-random number generator, this program should always output the
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* same number. Likewise, ns-3 simulations using random variables will
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* behave deterministically unless the user changes the Run number or the
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* Seed.
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*
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* There are three primary mechanisms to change the seed or run numbers
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* from their default integer value of 1:
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*
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* 1. Through explicit call of SeedManager::SetSeed () and
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* SeedManager::SetRun () (commented out below)
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* 2. Through the passing of command line arguments such as:
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* `./ns3 run program-name --command-template="%s --RngRun=<value>"`
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* 3. Through the use of the NS_GLOBAL_VALUE environment variable, such as:
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* `$ NS_GLOBAL_VALUE="RngRun=<value>" ./ns3 run program-name`
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*
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* For instance, setting the run number to 3 will change the program output to
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* 0.775417
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*
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* Consult the ns-3 manual for more information about the use of the
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* random number generator
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*/
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using namespace
ns3
;
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int
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main(
int
argc,
char
* argv[])
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{
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CommandLine
cmd
(__FILE__);
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cmd
.Parse(argc, argv);
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// SeedManager::SetRun (3);
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Ptr<UniformRandomVariable>
uv =
CreateObject<UniformRandomVariable>
();
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std::cout << uv->GetValue() << std::endl;
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return
0;
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}
ns3::CommandLine
Parse command-line arguments.
Definition
command-line.h:221
ns3::Ptr
Smart pointer class similar to boost::intrusive_ptr.
Definition
mpi-test-fixtures.h:37
ns3::CreateObject
Ptr< T > CreateObject(Args &&... args)
Create an object by type, with varying number of constructor parameters.
Definition
object.h:619
ns3
Every class exported by the ns3 library is enclosed in the ns3 namespace.
second.cmd
cmd
Definition
second.py:29
src
core
examples
sample-random-variable-stream.cc
Generated on Fri Nov 8 2024 13:58:59 for ns-3 by
1.11.0