22.允许重复的容器(unordered_multiset)

#include <string>
#include <iostream>
#include <unordered_set>
using namespace std;


void main()
{
    unordered_multiset<string> myset{ "pig", "pig", "pig" ,"chicken"};
    /*for (auto i : myset)
    {
        cout << i << endl;
    }*/

    auto it = myset.equal_range("pig");
    
    //输出所有重复数据
    //it.first链表的起点 it.second链表的终点
    for (auto ib = it.first, ie = it.second; ib != ie; ib++)
    {
        cout << *it.first << endl;
    }

    cin.get();
}