c++中cend end

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

vector::cend() is a library function of "vector" header, it can be used to get the last element of a vector. It returns a const iterator pointing to the past-the-end element of the vector.

vector :: cend()是“ vector”头文件的库函数，可用于获取矢量的最后一个元素。 它返回一个指向向量的past-the-end元素的const迭代器。

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

它返回一个const_iterator ，它是指向常量content(vector)的迭代器， const_itertator可以像迭代器一样增加或减少，但不能用于更新/修改其指向的向量内容。

Note:

注意：

• To use vector, include <vector> header.

  要使用vector，请包含<vector>标头。

• It does not point to the last element, thus to get the last element we can use vector::cend()-1.

  它不指向最后一个元素，因此要获取最后一个元素，我们可以使用vector :: cend()-1 。

Syntax of vector::cend() function

vector :: cend()函数的语法

    vector::cend();

Parameter(s): none – It accepts nothing.

参数： 无 –不接受任何内容。

Return value: const_iterator – It returns a const iterator pointing to the past-the-end element of the vector.

返回值： const_iterator –它返回指向向量的过去元素的const迭代器。

Example:

例：

    Input:
    vector<int> vector1{ 1, 2, 3, 4, 5 };

    Function call:
    vector<int>::const_iterator cit;
    cit = vector1.cend()-1;
    cout<
C++ STL program to demonstrate example of vector::cend() function
Output
last element is: 50

Reference: C++ vector::cend()






   
   


    
    


     
     


      
      

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翻译自: https://www.includehelp.com/stl/vector-cend-function-with-example.aspx

c++中cend end