C++

参考

<array>

array

public member function
<array>

std::array::data

      value_type* data() noexcept;const value_type* data() const noexcept;
Get pointer to data
Returns a pointer to the first element in the array object.

Because elements in the array are stored in contiguous storage locations, the pointer retrieved can be offset to access any element in the array.

参数

无

返回值

Pointer to the data contained by the array object.

If the array object is const-qualified, the function returns a pointer to const value_type. Otherwise, it returns a pointer to value_type.

成员类型value_typeis the type of the elements in the container, defined in array as an alias of its first template parameter (T).

示例

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// array::data
#include <iostream>
#include <cstring>
#include <array>

int main ()
{
  const char* cstr = "Test string";
  std::array<char,12> charray;

  std::memcpy (charray.data(),cstr,12);

  std::cout << charray.data() << '\n';

  return 0;
}

输出
Test string


复杂度

常量。

迭代器有效性

没有变化。

数据竞争

No contained elements are directly accessed by the call, but the pointer returned can be used to access or modify elements. Concurrently accessing or modifying different elements is safe.

异常安全

无异常保证：此成员函数从不抛出异常。

另见

array::begin
返回指向起始位置的迭代器 (公开成员函数)
array::front
访问第一个元素 (公开成员函数)
array::operator[]
访问元素 (公开成员函数)
array::fill
用值填充数组 (公开成员函数)