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c++ Programming Glossary: rand_max

Why do people say there is modulo bias when using a random number generator?

http://stackoverflow.com/questions/10984974/why-do-people-say-there-is-modulo-bias-when-using-a-random-number-generator

generator which chooses a natural number between 0 and RAND_MAX which is a constant defined in cstdlib see this article for.. between say 0 and 2. For the sake of explanation let's say RAND_MAX is 10 and I decide to generate a random number between 0 and.. range of numbers from 0 to n 1 with equal probability When RAND_MAX n n 1 . In this case along with our earlier assumption rand..

What is the optimal algorithm for generating an unbiased random integer within a range?

http://stackoverflow.com/questions/11758809/what-is-the-optimal-algorithm-for-generating-an-unbiased-random-integer-within-a

extrapolation static const double s_invRandMax 1.0 double RAND_MAX 1.0 return min int double max 1 min rand s_invRandMax to see.. the number of outputs from the random number generator RAND_MAX 1 is not evenly divisible by the desired range max min 1 . Since.. with ignoring it. The smaller the range and the larger RAND_MAX is the less pronounced the effect will be. I took your example..

How do you generate a random double uniformly distributed between 0 and 1 from C++?

http://stackoverflow.com/questions/1340729/how-do-you-generate-a-random-double-uniformly-distributed-between-0-and-1-from-c

An old school solution like double X double rand double RAND_MAX Should meet all your criteria portable standard and fast . obviously..

Generate random numbers uniformly over an entire range

http://stackoverflow.com/questions/288739/generate-random-numbers-uniformly-over-an-entire-range

3630000 3628441 3636376 3621404 From answers below OK RAND_MAX is 32767. I am on C Windows platform. Is there any other method.. numbers of a range for simple purposes is double rand RAND_MAX 1 max min 1 min Note make sure RAND_MAX 1 does not overflow.. is double rand RAND_MAX 1 max min 1 min Note make sure RAND_MAX 1 does not overflow thanks Demi The division generates a random..

Generating random integer from a range

http://stackoverflow.com/questions/5008804/generating-random-integer-from-a-range

have following C code output min rand int max min RAND_MAX The problem is that it is not really uniform max is returned.. it is not really uniform max is returned only when rand RAND_MAX for Visal C it is 1 32727 . This is major issue for small ranges..

C++ random float number generation

http://stackoverflow.com/questions/686353/c-random-float-number-generation

generate psudo random numbers in C . In combination with RAND_MAX and a little math you can generate random numbers in any arbitrary.. float r static_cast float rand static_cast float RAND_MAX This will generate a number from 0.0 to some arbitrary float.. float X float r2 static_cast float rand static_cast float RAND_MAX X This will generate a number from some arbitrary LO to some..

What is the best way to generate random numbers in C++?

http://stackoverflow.com/questions/9471604/what-is-the-best-way-to-generate-random-numbers-in-c

int irand int min int max return double rand double RAND_MAX 1.0 max min 1 min and don't forget to call srand before you..