rand.cpp File Reference

#include <Library/rand.hpp>

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Functions
int	rand (void)
void	srand (unsigned int seed)

Variables
unsigned long	_seedrand = 1

Detailed Description

Portable implementation of rand and srand as according to the C standard implementation by K&R.

Author

Brian Kernighan, Dennis Ritchie (C Standard Authors)

Michel (JMallone) Gomes (miche.nosp@m.ls@u.nosp@m.tfpr..nosp@m.edu..nosp@m.br)

Version

0.1

Date

2021-07-20

Copyright

C Programming Language copyright Brian Kernighan, Dennis Ritchie

Implementation Copyright the Xyris Contributors (c) 2021.

References: https://wiki.osdev.org/Random_Number_Generator#The_Standard.27s_Example https://pubs.opengroup.org/onlinepubs/9699919799/functions/rand.html

Definition in file rand.cpp.

Function Documentation

rand()

int rand

(

void

)

Return a random value.

Returns

int Value from random number generator

Definition at line 22 of file rand.cpp.

{
    _seedrand = _seedrand * 214013L + 2531011L;
    return (unsigned int)(_seedrand >> 16) & MAX_RAND;
}

srand()

void srand

(

unsigned int

seed

)

Set a seed to rand.

Parameters

seed	Random number generator seed

Definition at line 28 of file rand.cpp.

{
    _seedrand = seed;
}

Variable Documentation

_seedrand

unsigned long _seedrand = 1

Definition at line 20 of file rand.cpp.