---
name: "__gnu_parallel::random_number"
section: "3"
platform: "linux"
package: "libstdc++6-4.3-doc"
version: "4.3.2-1.1"
release: "Debian 5.0 (Lenny)"
platforms: ["linux"]
url: "https://new.carta.tech/__gnu_parallel::random_number"
---

# \_\_gnu\_parallel::random\_number(3)

## NAME

\_\_gnu\_parallel::random\_number -

## SYNOPSIS

## Detailed Description

Random number generator, based on the Mersenne twister.

Definition at line 47 of file random\_number.h.

### Public Member Functions

unsigned long **genrand\_bits** (int bits)\
 **uint32** **operator()** (**uint64** local\_supremum)\
 **uint32** **operator()** ()\
 **random\_number** (**uint32** seed, **uint64** supremum=0x100000000ULL)\
 **random\_number** ()\

## Constructor & Destructor Documentation

### \_\_gnu\_parallel::random\_number::random\_number ()` [inline]`

Default constructor. Seed with 0.

Definition at line 79 of file random\_number.h.

### \_\_gnu\_parallel::random\_number::random\_number (uint32 seed, uint64 supremum = `0x100000000ULL`)` [inline]`

Constructor.

**Parameters:**

*seed* Random seed. \
 *supremum* Generate integer random numbers in the interval \[0,supremum).

Definition at line 90 of file random\_number.h.

## Member Function Documentation

### unsigned long \_\_gnu\_parallel::random\_number::genrand\_bits (int bits)` [inline]`

Generate a number of random bits, run-time parameter.

**Parameters:**

*bits* Number of bits to generate.

Definition at line 114 of file random\_number.h.

### uint32 \_\_gnu\_parallel::random\_number::operator() (uint64 local\_supremum)` [inline]`

Generate unsigned random 32-bit integer in the interval \[0,local\_supremum).

Definition at line 105 of file random\_number.h.

### uint32 \_\_gnu\_parallel::random\_number::operator() ()` [inline]`

Generate unsigned random 32-bit integer.

Definition at line 99 of file random\_number.h.

## Author

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