explicit lognormal_distribution( RealType m = 0.0, RealType s = 1.0 );
(1) (since C++11)
explicit lognormal_distribution( const param_type& params );
(2) (since C++11)

Constructs a new distribution object. The first version uses m and s as the distribution parameters, the second version uses params as the distribution parameters.

[edit] Parameters

m - the m distribution parameter (log-scale)
s - the s distribution parameter (shape)
params - the distribution parameter set