srand(time(0));I would put this line as the first line in main()
instead if calling it multiple times (which will actually lead to less
random numbers@H_403_9@).
……我已经加粗了我遇到问题的路线…重复一般建议,在程序中拨打srand一次.像srand() — why call only once?这样的问题重新迭代,因为time(0)以秒为单位返回当前时间,在同一秒内多次调用srand将产生相同的种子.常见的解决方法是使用毫秒或纳秒.
但是,我不明白为什么这意味着srand应该或者只能被调用一次,或者它如何导致更少的随机数.
Generally speaking,the pseudo-random number generator should only be
seeded once,before any calls to rand(),and the start of the program.
It should not be repeatedly seeded,or reseeded every time you wish to generate a new batch of pseudo-random numbers.@H_403_9@
phoxis对srand() — why call only once?的回答：
Initializing once the initial state with the seed value will generate
enough random numbers as you do not set the internal state with srand,
thus making the numbers more probable to be random.@H_403_9@
也许他们只是使用不精确的语言,没有一个解释似乎解释了为什么多次调用srand是坏的(除了生成相同的随机数序列)或它如何影响数字的“随机性”.有人可以为我清楚这一点吗？
