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
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
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;
}