> Anna Sidera <sidera.anna@xxxxxxxxx> writes: > >>>From this, can I find out when the numbers start repeating? How can I >>> find it? I cannot find the period using >> >> man rand > > This question really doesn't have anything to do with gcc. gcc does not > provide a rand function. The rand function will come from your C > library, and gcc does not include a C library. > > If you are using GNU glibc, which is probably the case if you are using > a GNU/Linux system, then rand is not implemented as a linear > congruential generator, and the period is quite long. See the source > code. > At risk of being well and truely off topic, I suggest that prng folks look at the "Mersenne twister" algorithm developed by Makoto Matsumoto and Takuji Nishimura : http://en.wikipedia.org/wiki/Mersenne_twister Works great. I think that ends this topic. -- -- +-------------------------+-----------------------------------+ | Dennis Clarke | Solaris and Linux and Open Source | | dclarke@xxxxxxxxxxxxx | are my passion. ( FREE == OPEN ) | +-------------------------+-----------------------------------+
