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< cpp‎ | concept

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C++
 
C + + concetti
Di base
Original:
Basic
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Biblioteca-Wide
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Library-Wide
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Container
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Container
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Elementi contenitori
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Container Elements
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Iterator
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Iterator
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Numeri casuali
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Random Numbers
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RandomNumberDistribution(C++11)
UniformRandomNumberGenerator(C++11)
RandomNumberEngineAdaptor(C++11)
Concorrenza
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Concurrency
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BasicLockable(C++11)
Lockable(C++11)
TimedLockable(C++11)
Mutex(C++11)
TimedMutex(C++11)
Altro
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Other
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Un RandomNumberDistribution è un oggetto funzione che restituisce numeri casuali secondo una funzione di densità di probabilità p(x) o un distribuzione di probabilità discreta P(x
i).
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A RandomNumberDistribution is a function object returning random numbers according to a funzione di densità di probabilità p(x) or a distribuzione di probabilità discreta P(x
i).
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[modifica] Requisiti

This section is incomplete
  • D è una classe conforme ai requisiti RandomNumberDistribution. Essa deve inoltre soddisfare i requisiti e CopyConstructible CopyAssignable.
    Original:
    D is a class meeting the RandomNumberDistribution requirements. It shall also satisfy the CopyConstructible and CopyAssignable requirements.
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  • T è il result_type associato.
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    T is the associated result_type.
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  • P è il param_type associato. Esso deve soddisfare i CopyConstructible, CopyAssignable ei requisiti EqualityComparable.
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    P is the associated param_type. It shall satisfy the CopyConstructible, CopyAssignable, and EqualityComparable requirements.
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  • d è un oggetto di D e x, y sono oggetti potenzialmente const di D.
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    d is an object of D and x,y are potentially const objects of D.
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  • p è un valore possibilmente costante di P.
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    p is a possibly constant value of P.
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  • g, g1, g2 lvalue sono riuniti il ​​concetto UniformRandomNumberGenerator.
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    g,g1,g2 are lvalues meeting the UniformRandomNumberGenerator concept.
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  • os è un lvalue di std::basic_ostream.
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    os is an lvalue of std::basic_ostream.
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  • is è un lvalue di std::basic_istream.
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    is is an lvalue of std::basic_istream.
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Expression Type Notes Complexity
D::result_type T An arithmetic type compile-time
D::param_type P compile-time
D() constant
D(p) Same as p's construction
d.reset() void Resets the internal state of the distribution object. After a call to this function, the next call to operator() on the distribution object will not be dependent on previous calls to operator(). constant
x.param() P No worse than D(p)
d.param(p) void No worse than D(p)
d(g) T d(g, d.param()) Same as d(g, d.param())
d(g,p) T When called with the same g and p parameter it returns a sequence of numbers distributed according to p(x;p) or P(x
i;p) 		Amortized constant number of incovations of g
x.min() T The greatest lower bound returned by operator() constant
x.max() T The least upper bound returned by operator() constant
x == y bool constant
y != y bool !(x == y) constant
os << x Reference to the type of os Writes a textual representation of the distribution parameters and internal state to os as textual representation. The formatting flags and fill character of os are unchanged.
is >> d Reference to the type of is Restores the distribution parameters and internal state with data read from is. The formatting flags of is are unchanged. The data must have been written using a stream with the same locale, CharT and Traits template parameters, otherwise the behavior is undefined. If bad input is encountered, is.setstate(std::ios::failbit) is called, which may throw std::ios_base::failure. d is unchanged in that case.
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