std::array

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C++
 
集装箱库
 
std::array
成员函数
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Member functions
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元素的访问
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Element access
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array::at
array::operator[]
array::front
array::back
array::data
迭代器
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Iterators
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array::begin
array::cbegin
array::end
array::cend
array::rbegin
array::crbegin
array::rend
array::crend
容量
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Capacity
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array::empty
array::size
array::max_size
修饰符
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Modifiers
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array::fill
array::swap
非成员函数
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Non-member functions
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get
swap
Helper类
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Helper classes
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tuple_size
tuple_element
 
Defined in header <array>
template<

    class T,
    std::size_t N

> struct array;
 （C++11 起）

std::array is a container that encapsulates constant size arrays.

This struct has the same aggregate type semantics as a C-style array. The size and efficiency of array<T,N> for some number of elements is equivalent to size and efficiency of the corresponding C-style array T[N]. The struct provides the benefits of a standard container, such as knowing its own size, supporting assignment, random access iterators, etc.

There is a special case for a zero-length array (N == 0). In that case, array.begin() == array.end(), which is some unique value. The effect of calling front() or back() on a zero-sized array is undefined.

array is an aggregate (it has no constructors and no private or protected members), which allows it to use aggregate-initialization.

An array can also be used as a tuple of N elements of the same type.

目录

[编辑] 会员类型

会员类型
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Member type
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 Definition
value_type T [edit]
size_type size_t [edit]
difference_type ptrdiff_t [edit]
reference value_type& [edit]
const_reference const value_type& [edit]
pointer T*[edit]
const_pointer const T*[edit]
iterator RandomAccessIterator [edit]
const_iterator
恒随机访问迭代器
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Constant random access iterator
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[edit]
reverse_iterator std::reverse_iterator<iterator> [edit]
const_reverse_iterator std::reverse_iterator<const_iterator> [edit]

[编辑] 成员函数

元素的访问
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Element access
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访问指定的元素与边界检查
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access specified element with bounds checking
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（公共成员函数） [edit]
访问指定的元素
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access specified element
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（公共成员函数） [edit]
访问的第一个元素
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access the first element
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（公共成员函数） [edit]
access the last element
（公共成员函数） [edit]
（C++11）
直接访问底层数组
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direct access to the underlying array
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（公共成员函数） [edit]
迭代器
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Iterators
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返回一个迭代的开始
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returns an iterator to the beginning
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（公共成员函数） [edit]

返回一个迭代的结束
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returns an iterator to the end
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（公共成员函数） [edit]

返回一个反向迭代的开始
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returns a reverse iterator to the beginning
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（公共成员函数） [edit]

返回一个反向迭代结束
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returns a reverse iterator to the end
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（公共成员函数） [edit]
容量
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Capacity
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检查是否容器是空的
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checks whether the container is empty
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（公共成员函数） [edit]
返回的元素数
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returns the number of elements
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（公共成员函数） [edit]
返回可能的最大数量的元素
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returns the maximum possible number of elements
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（公共成员函数） [edit]
操作
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Operations
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使用指定的值填充容器
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fill the container with specified value
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（公共成员函数） [edit]
交换的内容
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swaps the contents
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（公共成员函数） [edit]

[编辑] 非成员函数
字典中的值比较的array
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lexicographically compares the values in the array
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（函数模板） [edit]
accesses an element of an array
（函数模板） [edit]
专业的std::swap算法
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specializes the std::swap algorithm
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（函数模板） [edit]

[编辑] Helper类
获得的array大小
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obtains the size of an array
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（类模板专业化） [edit]
array的元素获得的类型
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obtains the type of the elements of array
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（类模板专业化） [edit]

[编辑] 为例

#include <string>
#include <iterator>
#include <iostream>
#include <algorithm>
#include <array>
 
int main()
{
    // construction uses aggregate initialization
    std::array<int, 3> a1{ {1,2,3} };    // double-braces required
    std::array<int, 3> a2 = {1, 2, 3}; // except after =
    std::array<std::string, 2> a3 = { {std::string("a"), "b"} };
 
    // container operations are supported
    std::sort(a1.begin(), a1.end());
    std::reverse_copy(a2.begin(), a2.end(), std::ostream_iterator<int>(std::cout, " "));
 
    // ranged for loop is supported
    for(auto& s: a3)
        std::cout << s << ' ';
}

Output: 

3 2 1 a b
来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/container/array&oldid=28888”