c++中的dictionary对象：map的使用备忘

#include <map>
#include<string>  //一定要加，和string.h 不一样
#include <iostream>

using namespace std;

　　
void main()
{

    map <string, int> dic;
    dic.insert(pair<string, int>("a", 5));
    dic.insert(pair<string, int>("b", 2));
    dic.insert(pair<string, int>("a", 3)); //allow duplicate key
    dic.insert(pair<string, int>("c", 7));
    dic.insert(pair<string, int>("d", 9));
    dic.insert(pair<string, int>("e", 20));
    dic["c"] = 8;

    map<string,int>::iterator finder;; 
    finder=dic.find("c");

    if(finder==dic.end())
        cout<<"we do not find 112"<<endl;
    else
    {
        cout<<"total:"<<dic.size()<<endl;
        cout<<"wo find c:"<<dic["c"]<<endl;
        dic.erase(finder); //delete
        cout<<"total:"<<dic.size()<<endl;
    } 

    int c =0;
    c = getchar();
}

 可嵌套使用：

map <string, pair<int, int>> resources;
resources.insert(pair<string, pair<int, int>>("name",pair<int, int>(5,7)));

 怎么读取呢？

string data = resources[string("ABC.TTX")].first;