Standard C++ Library Reference ISO/IEC (VERSION3)

valarray::size

size_t size() const;

The member function returns the number of elements in the array.

valarray::sum

Ty sum() const;

The member function returns the sum of all elements of *this, which must have nonzero length. If the

length is greater than one, it adds values to the sum by applying operator+= between pairs of elements of

class Ty.

valarray::valarray

valarray();

explicit valarray(size_t count);

valarray(const Ty& val, size_t count));

valarray(const Ty *ptr, size_t count);

valarray(const slice_array<Ty>& slicearr);

valarray(const gslice_array<Ty>& gslicearr);

valarray(const mask_array<Ty>& maskarr);

valarray(const indirect_array<Ty>& indarr);

The first (default) constructor initializes the object to an empty array. The next three constructors each

initialize the object to an array of count elements as follows:

For explicit valarray(size_t count), each element is initialized with the default

constructor.

●

For valarray(const Ty& val, size_t count)), each element is initialized with val.●

For valarray(const Ty *ptr, size_t count), the element at position I is initialized

with p[I].

●

Each of the remaining constructors initializes the object to a valarray<Ty> object determined by the

argument.

valarray::value_type

typedef Ty value_type;

The type is a synonym for the template parameter Ty.

valarray<bool>

class valarray<bool>

The type is a specialization of template class valarray, for elements of type bool.

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