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Top Forums Shell Programming and Scripting Random numbers from 0 to 1000 Post 302214939 by radoulov on Tuesday 15th of July 2008 07:41:03 AM
Old 07-15-2008
If the RANDOM variable is available:

Code:
printf "%d\n" $(($RANDOM%1000+1))

 
Test Your Knowledge in Computers #575
Difficulty: Medium
If a program has poor memory management and fails to deallocate memory when it is no longer needed, the memory will not leak.
True or False?

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FBB::IRandStream(3bobcat)				      Random numbers istream					 FBB::IRandStream(3bobcat)

NAME
FBB::IRandStream - Istream producing random numbers SYNOPSIS
#include <bobcat/irandstream> Linking option: -lbobcat DESCRIPTION
FBB::IRandStream objects may be used to extract random numbers in a given range from a stream. NAMESPACE
FBB All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB. INHERITS FROM
std::istream, FBB::RandBuffer (private) CONSTRUCTORS
o IRandStream(int max): This FBB::IRandStream() constructor initializes the random generator. The default seed (i.e., 1) for the srand(3) function is used, meaning that every new run of the program will generate the same sequence of random values. Another constructor (see below) is pro- vided when this is not considered appropriate. Random values between 1 and max (inclusive) are returned. o IRandStream(int min, int max): This FBB::IRandStream() constructor initializes the random generator. The default seed (i.e., 1) for the srand(3) function is used, meaning that every new run of the program will generate the same sequence of random values. Another constructor (see below) is pro- vided when this is not considered appropriate. Random values between min and max (inclusive) are returned. o IRandStream(int min, int max, int seed): This FBB::IRandStream() constructor initializes the random generator. The seed is used to initialze the random number generator. To start the random generator at some unpredictable point, time(0) could be used. Random values between min and max (inclusive) are returned. INHERITED MEMBERS
Since the class uses public derivation from std::istream, all members of this class can be used. EXAMPLE
#include <iostream> #include <bobcat/irandstream> using namespace std; using namespace FBB; int main(int argc, char **argv) { IRandStream in(1000); for (; argc--; ) { size_t random; in >> random; cout << random << endl; } return 0; } FILES
bobcat/irandstream - defines the class interface SEE ALSO
bobcat(7), randbuffer(3bobcat) BUGS
None Reported. DISTRIBUTION FILES
o bobcat_3.01.00-x.dsc: detached signature; o bobcat_3.01.00-x.tar.gz: source archive; o bobcat_3.01.00-x_i386.changes: change log; o libbobcat1_3.01.00-x_*.deb: debian package holding the libraries; o libbobcat1-dev_3.01.00-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'. 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). libbobcat1-dev_3.01.00-x.tar.gz 2005-2012 FBB::IRandStream(3bobcat)

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