map与set

#pragma warning(disable:4786)#include <iostream>#include <map>#include<string>using namespace std;int main(){map<int,string> a;pair<int,string> a1(2,"tom");pair<int,string> a2(1,"sum");pair<int,string> a3(3,"jack");pair<int,string> a4(4,"huan");pair<int,string> a5(5,"hanppy");a.insert(a1);a.insert(a2);a.insert(a3);a.insert(a4);a.insert(a5);a.erase(2);//删除key值为2cout<<a[2]<<endl;//输出tommap<int,string>::iterator i=a.find(2);cout<<i->second<<endl;//运算符重载cout<< (*i).second<<endl;//运算符重载//set<int> a;//排序，vector<int>a不排序//////a.insert(2);//a.insert(3);//a.insert(4);//a.insert(5);return 0;}