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<html><head>
<title>FBB::RandBuffer</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::RandBuffer</h1>
<h2>libbobcat1-dev_2.20.01-x.tar.gz</h2>
<h2>2005-2011</h2>

<html><head>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1></h1>

<html><head>
<title>FBB::RandBuffer(3bobcat)</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::RandBuffer(3bobcat)</h1>
<h2>libbobcat1-dev_2.20.01-x.tar.gz random number streambuf</h2>
<h2>2005-2011</h2>


<p>
<h2>NAME</h2>FBB::RandBuffer - std::streambuf generating random numbers
<p>
<h2>SYNOPSIS</h2>
    <strong>#include &lt;bobcat/randbuffer&gt;</strong><br>
    Linking option: <em>-lbobcat</em> 
<p>
<h2>DESCRIPTION</h2>
<p>
<strong>FBB:RandBuffer</strong> objects may be used as a <strong>std::streambuf</strong> of
<em>std::istream</em> objects to allow the extraction of random numbers from the
stream.
<p>
<h2>NAMESPACE</h2>
    <strong>FBB</strong><br>
    All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace <strong>FBB</strong>.
<p>
<h2>INHERITS FROM</h2>
    std::streambuf
<p>
<h2>CONSTRUCTOR</h2>
    <ul>
    <li> <strong>Randbuffer(int min, int max, size_t seed = 1)</strong>:<br>
    This <strong>Randbuffer()</strong> constructor initializes the random generator. The
seed is used to initialze the random number generator.Random values between
<em>min</em> and <em>max</em> (inclusive) are returned.
    </ul>
<p>
<h2>VIRTUAL MEMBERS</h2>
<p>
<ul>
    <li> <strong>int underflow()</strong>:<br>
    This function is called by <em>std::istream</em> objects using
<strong>Randbuffer</strong>. It produces the next available random number, separating the
random numbers by one blanks space. Random values between <em>min</em> and <em>max</em>
(inclusive) are returned (see the description of the constructor).
    </ul>
<p>
<h2>INHERITED MEMBERS</h2>
<p>
Since the class uses public derivation from 
<strong>std::streambuf</strong>, all members of this class can be used.
<p>
<h2>EXAMPLE</h2>
    <pre>
#include &lt;iostream&gt;
#include &lt;istream&gt;

#include &lt;bobcat/randbuffer&gt;
#include &lt;bobcat/a2x&gt;

using namespace std;
using namespace FBB;

int main(int argc, char **argv)
{
    if (argc == 1)
    {
        cout &lt;&lt; "expect: nruns min max seed\n";
        return 1;
    }

    Randbuffer rb(A2x(argv[2]), A2x(argv[3]), A2x(argv[4]).to&lt;size_t&gt;());

    istream istr(&amp;rb);

    for (int idx = A2x(argv[1]); idx--; )
    {
        int c;
        if (!(istr &gt;&gt; c))
        {
            cout &lt;&lt; "extraction failed\n";
            break;
        }    
        cout &lt;&lt; "next: " &lt;&lt; c &lt;&lt; endl;
    }

    int count = 0;
    while (istr.unget())
        count++;

    cout &lt;&lt; "number of successful unget()-calls: " &lt;&lt; count &lt;&lt; endl;
    istr.clear();
    istr &gt;&gt; count;
    cout &lt;&lt; "and read: " &lt;&lt; count &lt;&lt; endl;
    
    return 0;
}
</pre>

<p>
<h2>FILES</h2>
    <em>bobcat/randbuffer</em> - defines the class interface
<p>
<h2>SEE ALSO</h2>
    <strong>bobcat</strong>(7), <strong>irandstream</strong>(3bobcat), <strong>rand</strong>(3), <strong>srand</strong>(3),
    <strong>std::streambuf</strong>
<p>
<h2>BUGS</h2>
    None Reported.
<p>

<h2>DISTRIBUTION FILES</h2>
    <ul>
    <li> <em>bobcat_2.20.01-x.dsc</em>: detached signature;
    <li> <em>bobcat_2.20.01-x.tar.gz</em>: source archive;
    <li> <em>bobcat_2.20.01-x_i386.changes</em>: change log;
    <li> <em>libbobcat1_2.20.01-x_*.deb</em>: debian package holding the
            libraries;
    <li> <em>libbobcat1-dev_2.20.01-x_*.deb</em>: debian package holding the
            libraries, headers and manual pages;
    <li> <em>http://sourceforge.net/projects/bobcat</em>: public archive location;
    </ul>
<p>
<h2>BOBCAT</h2>
    Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.
<p>
<h2>COPYRIGHT</h2>
    This is free software, distributed under the terms of the 
    GNU General Public License (GPL).
<p>
<h2>AUTHOR</h2>
    Frank B. Brokken (<strong>f.b.brokken@rug.nl</strong>).
<p>

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