Sep 27, 2011 · The c++ rand() function gives you a number from 0 to RAND_MAX (a constant defined in <cstdlib>), which is at least 32767. (from the c++ documentation) The modulus (%) …

Oct 28, 2015 · Like rand(), rand_r() returns a pseudo-random integer in the range [0, RAND_MAX]. The seedp argument is a pointer to an unsigned int that is used to store state …

If we use more than 53 bits, we get rounding bias. Some programmers write code like rand() / (double)RAND_MAX, but rand() might return only 31 bits, or only 15 bits in Windows. …

Jul 30, 2009 · Related: How to generate a random int in C?. Here is my answer there, which contains the definition for my int utils_rand(int min, int max) func, which returns a random …

int randint() { int random = rand(); return random; } int main() { // To get a unique sequence the random number generator should only be // seeded once during the life of the application. // As …

Now, assuming you obtained integers in the range from 0 to RAND_MAX - 1 (inclusively) by using std::rand() % RAND_MAX, the chance of getting a 0 would now be doubled, since it will be the …

Nov 19, 2012 · The common usage of std::rand() eliminates the possibility of a uniform distribution of pseudo-random numbers, because of the Pigeonhole Principle. The common way …

Apr 24, 2010 · int GetRandomNumber(int min, int max) { Random rand = new Random((int)DateTime.Now.Ticks); return rand.Next(min, max); } if you are looking for random …

Mar 14, 2013 · From the rand man page: The function rand() is not reentrant or thread-safe, since it uses hidden state that is modified on each call. So don't use it with threaded code. Use …

Oct 24, 2013 · The equivalent half-open range is [0, n), and rand() % n == rand() % (n-0) + 0. So the lesson is: don't confuse half-open ranges for closed ranges. A second lesson is that this …