vector cbegin

C ++ vector :: cbegin()函數(shù) (C++ vector::cbegin() function)

vector::cbegin() is a library function of "vector" header, it is used to get the const iterator pointing to the first element of the vector.

vector :: cbegin()是“ vector”頭文件的庫(kù)函數(shù)，用于獲取指向向量第一個(gè)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.

它返回一個(gè)const_iterator ，它是指向常量content(vector)的迭代器， const_itertator可以像迭代器一樣增加或減少，但不能用于更新/修改其指向的向量?jī)?nèi)容。

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

注意：要使用向量，請(qǐng)包含<vector>標(biāo)頭。

Syntax of vector::cbegin() function

vector :: cbegin()函數(shù)的語(yǔ)法

vector::cbegin();

Parameter(s): none – It accepts nothing.

參數(shù)： 無(wú) –不接受任何內(nèi)容。

Return value: const_iterator – It returns a constant iterator pointing to the first element of the vector.

返回值： const_iterator –它返回一個(gè)常量迭代器，指向向量的第一個(gè)元素。

Example:

例：

Input:vector<int> vector1{ 1, 2, 3, 4, 5 };Function call:vector<int>::const_iterator cit;cit = vector1.cbegin();cout<

C++ program to demonstrate example of vector::cbegin() function

Output

first element is: 10

Reference: C++ vector::cbegin()

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翻譯自: https://www.includehelp.com/stl/vector-cbegin-function-with-example.aspx

vector cbegin

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