C++总结笔记（十一）常见容器map

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

void operMap()
{
 map<int,string> studentMap;
 studentMap[1] = "A";
 studentMap[2] = "B";
 studentMap[3] = "C";
 studentMap[4] = "D";
 studentMap[5] = "E";
 studentMap.insert(pair<int,string>(6,"F"));
 studentMap.insert(pair<int,string>(7,"G"));

 map<int,string>::iterator i;
 for(i=studentMap.begin();i!=studentMap.end();i++)
 {
  cout<<i->first<<"|"<<i->second<<endl;
 }

 string value = studentMap[4];
 cout<<"value="<<value<<endl;
 //******************************
 studentMap.erase(5);
 cout<<"After erase:"<<endl;
 map<int,string>::iterator ii;
 for(ii=studentMap.begin();ii!=studentMap.end();ii++)
 {
  cout<<ii->first<<"|"<<ii->second<<endl;
 }

 cout<<"After erase2:"<<endl;
 map<int,string>::iterator i1;
 //studentMap.erase(studentMap.begin(),--studentMap.end());

 for(i1=studentMap.begin();i1!=studentMap.end();i1++)
 {
  cout<<i1->first<<"|"<<i1->second<<endl;
 }

 //*********************************
 cout<<"Find the element:";
 studentMap.find(6);
 cout<<studentMap.find(6)->second<<endl;
}

int main()
{
 operMap();
 return 0;
}