CODEWITHSUNDEEP
c++random
markzzz
markzzz

Reputation: 47945

Online resources that proof that rand() can return 0?

I only found this, which says

Returns a pseudo-random integral number in the range between 0 and RAND_MAX.

But are 0 and RAND_MAX included? I need values from 0 to 1 (included), so:

rand() / double(RAND_MAX)

will works only if rand() can also returns 0 and RAND_MAX.

Upvotes: 0

Views: 73

Answers (1)

Baum mit Augen
Baum mit Augen

Reputation: 50053

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

From cppr, emphasize mine.

However, rand is old and bad, as for example described in this talk by STL. You should use the modern <random> facilities instead, in your case

std::uniform_real_distribution(0, std::nextafter(1.,2.));

Upvotes: 4

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