源码

#include <iostream>
#include <memory>
#include <map>
#include <string>
#include <vector>
#include <utility>
using namespace std;

class message{
    public:
        int num;
        string ptr;
        vector<string> vue;
};  

int main()
{
    map<std::string,shared_ptr<message>> test;
    pair<std::string,shared_ptr<message>> ptr;
    auto tk = make_shared<message>();
    tk->num = 1;
    tk->ptr = "hello";
    tk->vue.emplace_back(move(string("love")));
    ptr = make_pair(string("haha"),tk);
    test.emplace(ptr);

    for(auto iter = test.begin();iter!=test.end();++iter)
    {
        cout << iter->first << endl;
        shared_ptr<message> p = move(iter->second);
        cout << p->num << endl;
        cout << p->ptr << endl;
        for(auto it : p->vue)
        {
            cout << it << endl;
        }
    }
    return 0;
}

Run

C++ map中使用pair构造键值对小记_c++