std::rand

 

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rand

srand

RAND_MAX

 

definiert in Header <cstdlib>
int rand();

Gibt eine gleichmäßig verteilte pseudo-zufälligen ganzzahligen Wert zwischen ​0​ und RAND_MAX (0 und RAND_MAX enthalten) .

Original:

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

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srand() sollte aufgerufen werden, bevor irgendwelche Anrufe zu rand() den Zufallszahlengenerator zu initialisieren werden .

Original:

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

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Parameter

(None)

Original:

(none)

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Rückgabewert

Pseudo-Random-ganzzahligen Wert zwischen ​0​ und RAND_MAX .

Original:

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

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Beispiel

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

Possible output:

Uniform random value on [0 2147483647]: 1373858591

Siehe auch

srand	initialisiert Pseudo-Zufallszahlengenerator 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. (Funktion)
C documentation for rand