std::vector::vector

 

C++

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概念

实用工具库

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算法库

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输入/输出库

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正则表达式库 （C++11）

原子操作库 （C++11）

线程的支持库 （C++11）

 

容器库

array （C++11）

vector

deque

forward_list （C++11）

list

set

multiset

map

multimap

unordered_set （C++11）

unordered_multiset （C++11）

unordered_map （C++11）

unordered_multimap （C++11）

stack

queue

priority_queue

 

std::vector

成员函数 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

vector::get_allocator

元素的访问 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

vector::operator[]

vector::front

vector::back

vector::data （C++11）

迭代器 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）

vector::end vector::cend （C++11）

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

vector::rend vector::crend （C++11）

容量 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

vector::size

vector::max_size

vector::reserve

vector::capacity

vector::shrink_to_fit （C++11）

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

vector::clear

vector::insert

vector::emplace （C++11）

vector::erase

vector::push_back

vector::emplace_back （C++11）

vector::pop_back

vector::resize

vector::swap

 

explicit vector( const Allocator& alloc = Allocator() );	(1)
explicit vector( size_type count,                  const T& value = T(),                  const Allocator& alloc = Allocator());          vector( size_type count,                  const T& value,                  const Allocator& alloc = Allocator());	(2)	（至 C++11） （C++11 起）
explicit vector( size_type count );	(3)	（C++11 起）
template< class InputIt > vector( InputIt first, InputIt last,         const Allocator& alloc = Allocator() );	(4)
vector( const vector& other );	(5)
vector( const vector& other, const Allocator& alloc );	(5)	（C++11 起）
vector( vector&& other )	(6)	（C++11 起）
vector( vector&& other, const Allocator& alloc );	(6)	（C++11 起）
vector( std::initializer_list<T> init,         const Allocator& alloc = Allocator() );	(7)	（C++11 起）

从各种数据源和构建新的容器，可以使用用户提供的分配器alloc.

Original:

Constructs new container from a variety of data sources and optionally using user supplied allocator alloc.

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1)

默认构造函数。构造空的容器.

Original:

Default constructor. Constructs empty container.

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2)

构造容器元素的值countvalue副本.

Original:

Constructs the container with count copies of elements with value value.

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3)

构造count初始化的值（缺省构造，类）的实例T的容器。没有副本.

Original:

Constructs the container with count value-initialized (default constructed, for classes) instances of T. No copies are made.

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4)

构造的容器的内容的范围内[first, last).

Original:

Constructs the container with the contents of the range [first, last).

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5)

拷贝构造函数。副本的内容other构造的容器。 alloc不提供，分配器是通过调用std::allocator_traits<allocator_type>::select_on_copy_construction(other).

Original:

Copy constructor. Constructs the container with the copy of the contents of other. If alloc is not provided, allocator is obtained by calling std::allocator_traits<allocator_type>::select_on_copy_construction(other).

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6)

移动的构造函数。构造的容器与内容other使用移动语义。 alloc不提供，分配器是通过移动建设属于other从分配器.

Original:

Move constructor. Constructs the container with the contents of other using move semantics. If alloc is not provided, allocator is obtained by move-construction from the allocator belonging to other.

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7)

构造容器初始化列表的内容init

Original:

Constructs the container with the contents of the initializer list init.

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参数

alloc	-	使用这个容器中的所有内存分配的分配器 Original: allocator to use for all memory allocations of this container The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	的容器的大小 Original: the size of the container The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
value	-	的值初始化容器的元素 Original: the value to initialize elements of the container with The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
first, last	-	取值范围为从复制元素 Original: the range to copy the elements from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
other	-	要用作源初始化容器的元素与另一个容器 Original: another container to be used as source to initialize the elements of the container with The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
init	-	的初始化列表初始化容器元素 Original: initializer list to initialize the elements of the container with The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Type requirements
- InputIt must meet the requirements of InputIterator.

复杂性

1)

常数

Original:

Constant

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2-3)

线性count

Original:

Linear in count

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4)

first和last之间的距离呈线性关系

Original:

Linear in distance between first and last

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5)

线性大小other

Original:

Linear in size of other

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6)

常数。如果alloc，并给出alloc != other.get_allocator()，则采用线性.

Original:

Constant. If alloc is given and alloc != other.get_allocator(), then linear.

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7)

线性大小init

Original:

Linear in size of init

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为例

#include <vector>
#include <string>
 
int main()
{
    // c++11 initializer list syntax:
    std::vector<std::string> words1 {"the", "frogurt", "is", "also", "cursed"};
 
    // words2 == words1
    std::vector<std::string> words2(words1.begin(), words1.end());
 
    // words3 == words1
    std::vector<std::string> words3(words1);
 
    // words4 is {"Mo", "Mo", "Mo", "Mo", "Mo"}
    std::vector<std::string> words4(5, "Mo");
 
    return 0;
}

另请参阅

assign	将值分配到容器中 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. （公共成员函数）
operator=	将值分配到容器中 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. （公共成员函数）