Use of qsrand, random method that is not random

Question

I\'m having a strange problem here, and I can\'t manage to find a good explanation to it, so I thought of asking you guys :

Consider the following method :

Answer 1

What you see is the effect of pseudo-randomness. You seed it with the time once, and it generates a sequence of numbers. Since you are pulling a series of random numbers very quickly after each other, you are re-seeding the randomizer with the same number until the next millisecond. And while a millisecond seems like a short time, consider the amount of calculations you're doing in that time.