stl vector 函数

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

vector::pop_back() is a library function of "vector" header, it is used to deletes an element from the end of the vector, it deletes the element from the back and returns void.

vector :: pop_back()是“ vector”头文件的库函数，用于从矢量末尾删除元素，从背面删除该元素并返回void。

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

注意：要使用向量，请包含<vector>标头。

Syntax of vector::pop_back() function

vector :: pop_back()函数的语法

    vector::pop_back();

Parameter(s): none – it accepts nothing.

参数： 无 –不接受任何内容。

Return value: none – In returns nothing.

返回值： none – In不返回任何内容。

Example:

例：

    Input:
vector<int> v1{10, 20, 30, 40, 50};
//removing elemenets
v1.pop_back();  //removes 50
v1.pop_back();  //removes 40
Output:
//if we print the values
v1: 10 20 30

C ++程序演示vector :: pop_back()函数的示例 (C++ program to demonstrate example of vector::pop_back() function)

//C++ STL program to demonstrate example of
//vector::pop_back() function
#include <iostream>
#include <vector>
using namespace std;
int main()
{
//vector declaration
vector<int> v1{ 10, 20, 30, 40, 50 };
//printing elements
cout << "v1: ";
for (int x : v1)
cout << x << " ";
cout << endl;
//removing elements
v1.pop_back();
v1.pop_back();
//printing elements
cout << "After removing elements..." << endl;
cout << "v1: ";
for (int x : v1)
cout << x << " ";
cout << endl;
return 0;
}

Output

输出量

v1: 10 20 30 40 50
After removing elements...
v1: 10 20 30

Reference: C++ vector::pop_back()

参考： C ++ vector :: pop_back()

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

stl vector 函数