stl vector 函数_vector :: crbegin（）函数，以及C ++ STL中的示例

stl vector 函数

C ++ vector :: crbegin()函数 (C++ vector::crbegin() function)

vector::crbegin() is a library function of "vector" header, it is used to get the last element of a vector using const_reverse_iterator, it returns a const reverse iterator pointing to the last elements (i.e. the reverse beginning) of a vector.

vector :: crbegin()是“ vector”头文件的库函数，用于使用const_reverse_iterator获取向量的最后一个元素，它返回一个const反向迭代器，指向向量的最后一个元素(即，反向开始) 。

It returns a const_reverse_iterator which is an iterator point to the constant content(vector), the const_reverse_iterator can be increased or decreased just like an iterator but it cannot be used to update/modify the vector content it points to.

它返回const_reverse_iterator ，它是指向常量content(vector)的迭代器，可以像迭代器一样增加或减少const_reverse_iterator ，但不能用于更新/修改其指向的向量内容。

Note: To use vector, include <vector> header.

注意：要使用向量，请包含<vector>标头。

Syntax of vector::crbegin() function

vector :: crbegin()函数的语法

    vector::crbegin();

Parameter(s): none – It accepts nothing.

参数： 无 –不接受任何内容。

Return value: const_reverse_iterator – It returns a const reverse iterator pointing to the last element of the vector.

返回值： const_reverse_iterator –它返回指向向量的最后一个元素的const反向迭代器。

Example:

例：

    Input:
vector<int> vector1{ 1, 2, 3, 4, 5 };
Function call:
vector<int>::const_iterator crit;
crit = vector1.crbegin();
cout<
C++ program to demonstrate example of vector::crbegin() function
Output
last element is: 50

Reference: C++ vector::crbegin()



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