randbuffer.3bobcat

Langue: en

Autres versions - même langue

Version: 340870 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

FBB::RandBuffer - std::streambuf generating random numbers

SYNOPSIS

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

DESCRIPTION

FBB:RandBuffer objects may be used as a std::streambuf of std::istream objects to allow the extraction of random numbers from the stream.

NAMESPACE

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

INHERITS FROM

std::streambuf

CONSTRUCTOR

o
Randbuffer(int min, int max, size_t seed = 1):
This Randbuffer() constructor initializes the random generator. The seed is used to initialze the random number generator.Random values between min and max (inclusive) are returned.

VIRTUAL MEMBERS

o
int underflow():
This function is called by std::istream objects using Randbuffer. It produces the next available random number, separating the random numbers by one blanks space. Random values between min and max (inclusive) are returned (see the description of the constructor).

INHERITED MEMBERS

Since the class uses public derivation from std::streambuf, all members of this class can be used.

EXAMPLE

 #include <iostream>
 #include <istream>
 
 #include <bobcat/randbuffer>
 #include <bobcat/a2x>
 
 using namespace std;
 using namespace FBB;
 
 int main(int argc, char **argv)
 {
     if (argc == 1)
     {
         cout << "expect: nruns min max seed\n";
         return 1;
     }
 
     Randbuffer rb(A2x(argv[2]), A2x(argv[3]), A2x(argv[4]).to<size_t>());
 
     istream istr(&rb);
 
     for (int idx = A2x(argv[1]); idx--; )
     {
         int c;
         if (!(istr >> c))
         {
             cout << "extraction failed\n";
             break;
         }    
         cout << "next: " << c << endl;
     }
 
     int count = 0;
     while (istr.unget())
         count++;
 
     cout << "number of successful unget()-calls: " << count << endl;
     istr.clear();
     istr >> count;
     cout << "and read: " << count << endl;
     
     return 0;
 }

FILES

bobcat/randbuffer - defines the class interface

SEE ALSO

bobcat(7), irandstream(3bobcat), rand(3), srand(3), std::streambuf

BUGS

None Reported.

DISTRIBUTION FILES

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bobcat_2.08.01-x.dsc: detached signature;
o
bobcat_2.08.01-x.tar.gz: source archive;
o
bobcat_2.08.01-x_i386.changes: change log;
o
libbobcat1_2.08.01-x_*.deb: debian package holding the libraries;
o
libbobcat1-dev_2.08.01-x_*.deb: debian package holding the libraries, headers and manual pages;
o
http://sourceforge.net/projects/bobcat: public archive location;

BOBCAT

Bobcat is an acronym of `Brokken's Own Base Classes And Templates'. This is free software, distributed under the terms of the GNU General Public License (GPL).

AUTHOR

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