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Asked: 2026-06-01T03:48:42+00:00

I am using c++11 new <random> header in my application and in one class

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I am using c++11 new <random> header in my application and in one class in different methods I need different random number with different distributions. I just put a random engine std::default_random_engine as class member seed it in the class constructor with std::random_device and use it for different distributions in my methods. Is that OK to use the random engine in this way or I should declare different engines for every distribution I use.

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  1. Editorial Team

    It’s ok.

    Reasons to not share the generator:

    • threading (standard RNG implementations are not thread safe)

    • determinism of random sequences:

      If you wish to be able (for testing/bug hunting) to control the exact sequences generated, you will by likely have fewer troubles by isolating the RNGs used, especially when not all RNGs consumption is deterministic.

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