std::linear_congruential_engine<UIntType,a,c,m>::operator() - cppreference.com

From cppreference.com

result_typeoperator()();(since C++11)Advances the state of the engine, and generates a pseudo-random value from the new state.

Return value

A pseudo-random number in [min(), max()].

Complexity

Amortized constant.

See also

advances the engine's state by a specified amount
(public member function)

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