std::rand

 

C++

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rand

srand

RAND_MAX

 

Definido en la cabecera <cstdlib>
int rand();

Devuelve una distribuida uniformemente pseudo-aleatorio valor integral entre ​0​ y RAND_MAX (0 y RAND_MAX incluido) .

Original:

Returns a uniformly distributed pseudo-random integral value between ​0​ and RAND_MAX (0 and RAND_MAX included).

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srand() debe ser llamada antes de cualquier llamada a rand() para inicializar el generador de números aleatorios .

Original:

srand() should be called before any calls to rand() to initialize the random number generator.

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Parámetros

(Ninguno)

Original:

(none)

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Valor de retorno

Pseudo-random valor integral entre ​0​ y .. RAND_MAX

Original:

Pseudo-random integral value between ​0​ and RAND_MAX.

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Ejemplo

#include <cstdlib>
#include <iostream>
#include <ctime>
 
int main() 
{
    std::srand(std::time(0)); //use current time as seed for random generator
    int uniform_random_variable = std::rand();
    std::cout << "Uniform random value on [0 " << RAND_MAX << "]: " 
              << uniform_random_variable << '\n';
}

Posible salida:

Uniform random value on [0 2147483647]: 1373858591

Ver también

srand	inicializa pseudo-generador de números aleatorios Original: initializes pseudo-random number generator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función)
Documentacion C de rand