srand() seeds the random number generator. So by calling srand() with the time immediately before each call to rand(), and since your loops will take less than a second to execute, you'll always get the same random number (or maybe two if the time happens to change in the middle)....
为了提高随机数质量，可以考虑使用更先进的随机数生成算法或库，如Mersenne Twister算法。在安全敏感的应用中，如加密和密码学，应使用专门的安全随机数生成器，如操作系统提供的 /dev/urandom 或者特定的加密库，这些库通常基于更强的随机源，如硬件随机数生成器（Hardware Random Number Generator, HRNG）。5. 并发...
为了提高随机数质量,可以考虑使用更先进的随机数生成算法或库,如Mersenne Twister算法。在安全敏感的应用中,如加密和密码学,应使用专门的安全随机数生成器,如操作系统提供的/dev/urandom或者特定的加密库,这些库通常基于更强的随机源,如硬件随机数生成器(Hardware Random Number Generator, HRNG)。 5.并发环境下的随...
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Step 1. Be sure to include the standard library header to get the necessary function prototypes #include <stdlib.h> Step 2. Seed the random number generator using srand(). The seed determines where the random numbers start. The sequence of random numbers will always be exactly the same for...
2003a. Re: good C random number generator. Posting, Usenet newsgroup sci.lang.c. 13-May-2003.Marsaglia, G. 2003. Re: good C random number generator. Posting, Usenet newsgroup sci.lang.c. 13-May-2003.G. Marsaglia. Re: good C random number generator. Post on newsgroup comp.lang.c,...
/* For each of the currently supported random number generators, we have a break value on the amount of state information (you need at least thi bytes of state info to support this random number generator), a degree for the polynomial (actually a trinomial) that the R.N.G. is based ...
jrand48() — Pseudo-random number generator j0(), j1(), jn() — Bessel functions of the first kind kill() — Send a signal to a process killpg() — Send a signal to a process group labs() — Calculate long absolute value __lchattr() — Change the attributes of a file ...
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