std::vector::operator=

 

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std::vector

Член функций 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.

vector::vector

vector::~vector

vector::operator=

vector::assign

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Элемент доступа Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

vector::at

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Итераторы Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

vector::begin vector::cbegin (C++11)

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vector::rbegin vector::crbegin (C++11)

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Потенциала Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

vector::empty

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vector& operator=( const vector& other );	(1)
vector& operator=( vector&& other );	(2)	(начиная с C++11)

Заменяет содержимое контейнера.

Original:

Replaces the contents of the container.

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1)

Скопируйте оператор присваивания. Заменяет содержимое с копией содержимого other.

Original:

Copy assignment operator. Replaces the contents with a copy of the contents of other.

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2)

Переместите оператор присваивания. Заменяет содержимое с теми other использованием семантика переноса (т.е. данные в other перемещается из other в этот контейнер). other находится в силе, но неопределенное состояние после.

Original:

Move assignment operator. Replaces the contents with those of other using move semantics (i.e. the data in other is moved from other into this container). other is in valid, but unspecified state afterwards.

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Параметры

other

-

другой контейнер, который будет использоваться в качестве источника Original: another container to be used as source The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Возвращаемое значение

*this

Сложность

1)

Линейный в размер контейнера.

Original:

Linear in the size of the container.

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2)

Постоянное.

Original:

Constant.

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Пример

Следующий код использует , чтобы присвоить один std::vector в другую

Original:

The following code uses to assign one std::vector to another:

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#include <vector>
#include <iostream>
 
void display_sizes(const std::vector<int> &nums1,
                   const std::vector<int> &nums2,
                   const std::vector<int> &nums3)
{
    std::cout << "nums1: " << nums1.size()
              << " nums2: " << nums2.size()
              << " nums3: " << nums3.size() << '\n';
}
 
int main()
{
    std::vector<int> nums1 {3, 1, 4, 6, 5, 9};
    std::vector<int> nums2;
    std::vector<int> nums3;
 
    std::cout << "Initially:\n";
    display_sizes(nums1, nums2, nums3);
 
    // copy assignment copies data from nums1 to nums2
    nums2 = nums1;
 
    std::cout << "After assigment:\n";
    display_sizes(nums1, nums2, nums3);
 
    // move assignment moves data from nums1 to nums3,
    // modifying both nums1 and nums3
    nums3 = std::move(nums1);
 
    std::cout << "After move assigment:\n";
    display_sizes(nums1, nums2, nums3);
}

Вывод:

Initially:
nums1: 4 nums2: 0 nums3: 0
After assigment:
nums1: 4 nums2: 4 nums3: 0
After move assigment:
nums1: 0 nums2: 4 nums3: 4

См. также

(constructor)	строит vector Original: constructs the vector The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public функция-член)
assign	присваивает значения в контейнере Original: assigns values to the container The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public функция-член)