c ++ stl

Given a list with some of the elements, we have to access its first and last elements of the list in C++ (STL) program.

给定包含某些元素的列表，我们必须在C ++(STL)程序中访问列表的第一个和最后一个元素。

列表的front()和back()函数 (front() and back() function of the list)

These are two functions which can be used to get the first and last element of the list. 'front()' returns the first element and 'back()' returns the last element.

这是两个函数，可用于获取列表的第一个和最后一个元素。 'front()'返回第一个元素， 'back()'返回最后一个元素。

Let's implement the program below...

让我们实现下面的程序...

Example:

例：

    Input:
List: [10, 20, 30, 40, 50]
Output:
First element: 10
Last element: 50

Program:

程序：

#include <iostream>
#include <list>
using namespace std;
int main() 
{
list<int> iList = {10, 20, 30, 40, 50};
cout<<"First element: "<<iList.front()<<endl;
cout<<"Last element: "<<iList.back()<<endl;
return 0;
}

Output

输出量

First element: 10
Last element: 50

翻译自: https://www.includehelp.com/stl/get-the-first-and-last-element-of-the-list.aspx

c ++ stl