random_device Class

random_device Class

Generates a random sequence from an external device.

class random_device {
    typedef unsigned int result_type;
    explicit random_device(const std::string& token = /* implementation defined */);
    result_type min() const;
    result_type max() const;
    double entropy() const;
    result_type operator()();
    random_device(const random_device&) = delete;
    void operator=(const random_device&) = delete;

The class describes a source of random numbers, preferably from a non-deterministic external device. In this implementation the values produced by default are not non-deterministic. They are uniformly distributed in the closed range [0, 65535].

Header: <random>

Namespace: std

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