# FBB::RandomMT(3bobcat)

## Random Generator using std::mt19937
(libbobcat-dev_6.11.00)

## 2005-2025

## NAME

FBB::RandomMT - Class template generating random numbers

## SYNOPSIS

#include <bobcat/randommt>
Linking option: -lbobcat

## DESCRIPTION

The class template RandomMT uses the std::mt19937 Mercenne Twister to produce random numbers. The class template has one template type parameter, which can be any integral or floating point type. By default size_t-valued random numbers are generated.

## NAMESPACE

FBB
All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.

## INHERITS FROM

-

## CONSTRUCTORS

- RandomMT<typename Type = size_t>::RandomMT(Type minimum, Type maximum, size_t mtSeed):
  The Type template type parameter can be any integral or floating point type. If not specified size_t is used. The parameters minimum and maximum define the range of the generated random values. minimum must be less or equal to maximum, or an exception is thrown. The mtSeed parameter is used to initialize (seed) the mt19937 Mercenne Twister.

The default copy and move constructors and assignment operators are available.

## OVERLOADED OPERATORS

- Type operator()():
  The function call operator returns the next random value.

## EXAMPLE

    #include <iostream>

    #include <bobcat/randommt>

    using namespace std;
    using namespace FBB;

    int main(int argc, char **argv)
    try
    {
        if (argc == 1)
        {
            cout << "arg[1]: minimum value, arg[2]: maximum value,\n"
                    "arg[3]: (optional) seed (or time(0))\n";
            return 0;
        }

        // specify, e.g., RandomMt<double> to generate random double values
        RandomMT<> rmt( stoull(argv[1]), stoull(argv[2]),
                      argc >= 4 ? stoull(argv[3]) : time(0) );

        while (true)
        {
            cout << rmt() << "\n"
                    "Enter: next";
            cin.ignore(1000, '\n');
        }

    }
    catch (exception const &exc)
    {
        cerr << exc.what() << '\n';
    }

## FILES

bobcat/randommt - defines the class interface

## SEE ALSO

bobcat(7), irandstream(3bobcat), rand(3), randbuf(3bobcat), srand(3)

## BUGS

None Reported.

## BOBCAT PROJECT FILES

- https://fbb-git.gitlab.io/bobcat/: gitlab project page;

Debian Bobcat project files:

- libbobcat6: debian package containing the shared library, changelog and copyright note;
- libbobcat-dev: debian package containing the static library, headers, manual pages, and developer info;

## BOBCAT

Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.

## COPYRIGHT

This is free software, distributed under the terms of the GNU General Public License (GPL).

## AUTHOR

Frank B. Brokken (f.b.brokken@rug.nl).