Class rand48

boost::rand48

Synopsis

// In header: <boost/random/linear_congruential.hpp>


class rand48 {
public:
  // types
  typedef  ;

  // construct/copy/destruct
  ();
  ();
  template<typename SeedSeq> ();
  template<typename It> (, );

  // public static functions
   ();
   ();

  // public member functions
   ();
   ();
  template<typename It>  (, );
  template<typename SeedSeq>  ();
   ();
   ();
  template<typename Iter>  (, );

  // friend functions
  template<typename CharT, typename Traits> 
     
    (, );
  template<typename CharT, typename Traits> 
     
    (, );
   (, );
   (, );

  // public data members
  static  has_fixed_range;
};

Description

Class rand48 models a pseudo-random number generator . It uses the linear congruential algorithm with the parameters a = 0x5DEECE66D, c = 0xB, m = 2**48. It delivers identical results to the lrand48() function available on some systems (assuming lcong48 has not been called).

It is only available on systems where uint64_t is provided as an integral type, so that for example static in-class constants and/or enum definitions with large uint64_t numbers work.

`rand48` public construct/copy/destruct

```
();
```
Seeds the generator with the default seed.
```
( x0);
```
Constructs a rand48 generator with x(0) := (x0 << 16) | 0x330e.
```
template<typename SeedSeq> ( seq);
```
Seeds the generator with values produced by seq.generate().
```
template<typename It> ( first,  last);
```
Seeds the generator using values from an iterator range, and updates first to point one past the last value consumed.

`rand48` public static functions

```
 ();
```
Returns the smallest value that the generator can produce
```
 ();
```
Returns the largest value that the generator can produce

`rand48` public member functions

```
 ();
```
Seeds the generator with the default seed.
```
 ( x0);
```
Changes the current value x(n) of the generator to (x0 << 16) | 0x330e.
```
template<typename It>  ( first,  last);
```
Seeds the generator using values from an iterator range, and updates first to point one past the last value consumed.
```
template<typename SeedSeq>  ( seq);
```
Seeds the generator with values produced by seq.generate().
```
 ();
```
Returns the next value of the generator.
```
 ( z);
```
Advances the state of the generator by z.

template<typename Iter>  ( first,  last);

Fills a range with random values

`rand48` friend functions

template<typename CharT, typename Traits> 
   
  ( os,  r);

Writes a rand48 to a std::ostream.

template<typename CharT, typename Traits> 
   
  ( is,  r);

Reads a rand48 from a std::istream.

```
 ( x,  y);
```
Returns true if the two generators will produce identical sequences of values.
```
 ( x,  y);
```
Returns true if the two generators will produce different sequences of values.

Class rand48

Synopsis

Description

rand48 public construct/copy/destruct

rand48 public static functions

rand48 public member functions

rand48 friend functions

`rand48` public construct/copy/destruct

`rand48` public static functions

`rand48` public member functions

`rand48` friend functions