std::abs<div class="t-tr-text">(Std :: valarray)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::valarray)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Numeri libreria

Comuni funzioni matematiche

Virgola mobile ambiente

I numeri complessi

Array numerici

Pseudo-casuale generazione

In fase di compilazione aritmetica razionale(C++11)

Generici operazioni numeriche Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iota (C++11)

accumulate

inner_product

adjacent_difference

partial_sum

 

std::valarray

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
valarray::valarray valarray::~valarray valarray::operator= valarray::operator[] valarray::swap valarray::size valarray::resize valarray::sum valarray::min valarray::max valarray::shift valarray::cshift valarray::apply	valarray::operator+ valarray::operator- valarray::operator~ valarray::operator! valarray::operator+= valarray::operator-= valarray::operator*= valarray::operator/= valarray::operator%= valarray::operator&= valarray::operator|= valarray::operator^= valarray::operator<<= valarray::operator>>=
Non membri funzioni Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
swap (C++11) begin (C++11) end (C++11) abs exp log log10 pow sqrt sin cos tan asin acos atan atan2 sinh cosh tanh	operator* operator/ operator% operator+ operator- operator^ None operator& operator| operator<< operator>> operator&& operator None operator== operator!= operator< operator> operator<= operator>=
Helper classi Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
slice_array gslice_array indirect_array	slice gslice mask_array

 

Elemento definito nell'header <valarray>
template<class T > valarray<T> abs(const valarray<T>& va );

Calcola il valore assoluto di ogni elemento dell'array valore.

Original:

Computes absolute value of each element in the value array.

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Parametri

va

-

matrice valore per applicare l'operazione Original: value array to apply the operation to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

Valore matrice contenente i valori assoluti dei valori in va.

Original:

Value array containing absolute values of the values in va.

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Note

Funzione non qualificato (abs) viene utilizzato per eseguire il calcolo. Se tale funzione non è disponibile, std::abs viene utilizzato a causa di ricerca tesi a carico.

Original:

Unqualified function (abs) is used to perform the computation. If such function is not available, std::abs is used due to argument dependent lookup.

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La funzione può essere implementata con il tipo restituito diverso da std::valarray. In questo caso, il tipo di sostituzione ha le seguenti proprietà:

Original:

The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:

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• Tutte le funzioni di membro conststd::valarray sono forniti.

  Original:

  All const member functions of std::valarray are provided.

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• std::valarray, std::slice_array, std::gslice_array, std::mask_arraystd::indirect_array e può essere costruito con il tipo di sostituzione.

  Original:

  std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.

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• Tutte le funzioni che accettano un argomento di conststd::valarray& tipo devono anche accettare il tipo di sostituzione.

  Original:

  All functions accepting a arguments of type conststd::valarray& should also accept the replacement type.

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• Tutte le funzioni che accettano due argomenti di tipo conststd::valarray& dovrebbe accettare ogni combinazione di conststd::valarray& e il tipo di sostituzione.

  Original:

  All functions accepting two arguments of type conststd::valarray& should accept every combination of conststd::valarray& and the replacement type.

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Possibile implementazione

template<class T > valarray<T> abs(const valarray<T>& va ){ valarray<T> other = va;for(T &i : other){ i = abs(i);}return other;// proxy object may be returned}

Esempio

#include <valarray>#include <iostream>   int main(){std::valarray<int> v{1, -2, 3, -4, 5, -6, 7, -8};std::valarray<int> v2 = std::abs(v);for(auto n : v2){std::cout<< n <<' ';}std::cout<<'\n';}

Output:

1 2 3 4 5 6 7 8

Vedi anche

abs(int)	calcola il valore assoluto di un valore integrale (|x|) Original: computes absolute value of an integral value (|x|) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
abs(float)	valore assoluto di un valore in virgola mobile (|x|) Original: absolute value of a floating point value (|x|) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
abs(std::complex)	restituisce la grandezza di un numero complesso Original: returns the magnitude of a complex number The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello)