set集合rbegin()函数运用实例

rbegin函数

语法:rbegin

1	reverse_iterator rbegin() const;

rbegin()返回指向集合中最后一个元素的反向迭代器

源代码

/**

* Returns a read/write reverse iterator that points to the last element

* in the %set. Iteration is done in descending order according to the

* keys.

reverse_iterator

rbegin() const

{ return _M_t.rbegin(); }

测试代码

// 梁笔记

// https://zouzhongliang.com

#include <iostream>

#include <set>

using namespace std;

int main()

{

set<int> s1;

s1.insert(10);

s1.insert(12);

s1.insert(13);

s1.insert(9);

cout<<"s1集合中元素："<<endl;

set<int>::reverse_iterator iter = s1.rbegin();

for(iter;iter!=s1.rend();iter++){

cout<<*iter<<" ";

}

cout<<endl;

}

测试结果：

1 2	s1集合中元素： 13 12 10 9