Random Sources

The data type random_source is a random number generator (based on the function random() from Berkeley UNIX). It can be used to generate uniformly distributed random bits, characters, ints and doubles.

It can be in either of two modes:

• In bit mode: it generates a random bit string of some length p ( 1 < = p < = 31)
• In integer mode: it generates a random integer in some range [low..high] ( low < = high < low + 2³¹).

Remark: The data type random_source is only pseudorandom. The seed depends on the internal clock.

Example

#include <LEDA/core/random_source.h>

int main()
{
  leda::random_source S;
  int ri;
  S >> ri;
  std::cout << ri << std::endl;

  return 0;
}

Tip

See also:

Random Variates: non-uniform random number generator with static weight function

Dynamic Random Variate: non-uniform random number generator with dynamic weight function

Manual Page Random Sources