Author: Thorsten Greiner
Date: 08:29:25 01/13/00
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On January 13, 2000 at 11:22:20, Vincent Diepeveen wrote: >number = rand()%total; rand() is evil. It uses a linear congruency method like new random number = (old random number * constant + constant) % constant Information in low bits of 'old random number' is lost in this formula. Since the number of seconds since 1970 is pretty much constant in lets say January 2000, the random numbers produced will be quite similar... Also, never use modulo on the results of rand() - use something like rand() / (RAND_MAX / total) since the low bits of rand() are not as random as the high bits. Or use a real random generator - here is a good one: http://www.agner.org/random Rgds -Thorsten
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