26 Numerics library [numerics]

26.6 Random number generation [rand]

26.6.8 Random number distribution class templates [rand.dist]

26.6.8.2 Uniform distributions [rand.dist.uni]

26.6.8.2.2 Class template uniform_real_distribution [rand.dist.uni.real]

A uniform_real_distribution random number distribution produces random numbers x, ax < b , distributed according to the constant probability density function p(x | a,b) = 1 / (b - a) . Note: This implies that p(x | a,b) is undefined when a == b.  — end note ]

template<class RealType = double>
 class uniform_real_distribution{
public:
 // types
 using result_type = RealType;
 using param_type  = unspecified;

 // constructors and reset functions
 explicit uniform_real_distribution(RealType a = 0.0, RealType b = 1.0);
 explicit uniform_real_distribution(const param_type& parm);
 void reset();

 // generating functions
 template<class URBG>
   result_type operator()(URBG& g);
 template<class URBG>
   result_type operator()(URBG& g, const param_type& parm);

 // property functions
 result_type a() const;
 result_type b() const;
 param_type param() const;
 void param(const param_type& parm);
 result_type min() const;
 result_type max() const;
};

explicit uniform_real_distribution(RealType a = 0.0, RealType b = 1.0);

Requires: ab and b - anumeric_limits<RealType>::max() .

Effects: Constructs a uniform_real_distribution object; a and b correspond to the respective parameters of the distribution.

result_type a() const;

Returns: The value of the a parameter with which the object was constructed.

result_type b() const;

Returns: The value of the b parameter with which the object was constructed.