I don't understand QRandomGenerator.

[tsvigo]

How does the class generate this? I played with him - he doesn’t pay attention to boundaries. Min-max he writes min=0 max=18446744073709551615. When generating, a negative number is written through the number.

[Bonnie]

If you need boundaries then use bounded() instead of generate().
It will not change the min()/max() result but it returns the bounded result directly.

BTW, mine QRandomGenerator::max() returns 4294967295 and QRandomGenerator64::max() returns 18446744073709551615.
So if you are using QRandomGenerator64 which returns a quint64 value and assign the result to an int, then it is normal to get a negative number .

[tsvigo]

@Bonnie , thank you. I understand - in my system the maximum unsigned long long integer is two times less than the maximum from the generator.

[JonB]

@tsvigo
Not sure quite what you mean or if there is still a question? QRandomGenerator has overloads which return quint32 or quint64 with generate[64]() and bounded(). If necessary pass your desired maximum value to bounded().

The return values of quint32 or quint64 are not "negative", they are unsigned/positive. What you do with that and when "written through the number" is a different matter.