stl vector 函数

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

vector::push_back() is a library function of "vector" header, it is used to insert/add an element at the end of the vector, it accepts an element of the same type and adds the given element at the end of the vector and increases the size of the vector.

vector :: push_back()是“ vector”标头的库函数，用于在vector的末尾插入/添加元素，它接受相同类型的元素并在给定的末尾添加给定元素向量并增加向量的大小。

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

注意：要使用向量，请包含<vector>标头。

Syntax of vector::push_back() function

vector :: push_back()函数的语法

    vector::push_back(value_type n);

Parameter(s): n – is an element to be added at the end of the vector.

参数： n –是要在向量末尾添加的元素。

Return value: void – In returns nothing.

返回值： void – In不返回任何内容。

Example:

例：

    Input:
vector<int> v1;
v1.push_back(20);
v1.push_back(30);
v1.push_back(40);
v1.push_back(50);
Output:
//if we print the values
v1: 20 30 40 50

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

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

Output

输出量

size of v1: 0
size of v1: 1
size of v1: 5
elements of vector v1...
10 20 30 40 50

Reference: C++ vector::push_back()

参考： C ++ vector :: push_back()

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

stl vector 函数