std::piecewise_constant_distribution::piecewise_constant_distribution
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                    < cpp | numeric | random | piecewise constant distribution
                    
                                                            
                    | piecewise_constant_distribution(); | (1) | (since C++11) | 
| template< class InputIt1, class InputIt2 > piecewise_constant_distribution( InputIt1 first_i, InputIt1 last_i, | (2) | (since C++11) | 
| template< class UnaryOperation > piecewise_constant_distribution( std::initializer_list<RealType> bl,  | (3) | (since C++11) | 
| template< class UnaryOperation > piecewise_constant_distribution( std::size_t nw,  | (4) | (since C++11) | 
| explicit piecewise_constant_distribution( const param_type& parm ); | (5) | (since C++11) | 
Constructs new piecewise constant distribution object.
1) Constructs a distribution object with n = 1, ρ0 = 1, b0 = 0, and b1 = 1.
2) Constructs a distribution object from iterators over the interval sequence 
[first_i, last_i) and a matching weight sequence starting at first_w.3) Constructs a distribution object where the intervals are taken from the initializer list 
bl and the weights generated by the function fw.4) Constructs a distribution object with the 
nw intervals distributed uniformly over [xmin, xmax] and the weights generated by the function fw.5) Constructs a distribution object initialized with the parameters 
param.Parameters
| first_i | - | iterator initialized to the start of the interval sequence | 
| last_i | - | iterator initialized to one-past-the-end of the interval sequence | 
| first_w | - | iterator initialized to the start of the density (weight) sequence | 
| ilist_i | - | initializer_list yielding the interval sequnce | 
| fw | - | double(double) function yielding the densities | 
| nw | - | the number of densities | 
| xmin | - | the lower bound of the interval sequence | 
| xmax | - | the upper bound of the interval sequence | 
| parm | - | the distribution parameter set |