[C++知识库]循环遍历map容器，erase元素的问题

#include <iostream>
#include <map>

using namespace std;

int main()
{
    map<string,string> testMap{
        {"cpp","cpppp"},
        {"java","javaaaa"},
        {"shell","shelllll"},
        {"python", "pythonnnn"}
    };
    map<string,string>::iterator it; 
    //cout<<"Hello World";
    for(auto& var : testMap)
    {
        cout<<var.first << " "<<var.second<<endl;
    }
    cout<<"==================================="<<endl;
    for(it=testMap.begin();it!=testMap.end();++it)
    {
        //cout<<it->first << it->second<<endl;
        if(it->first=="cpp")
        {    
             cout<<"del first==cpp"<<endl;
             cout<<it->second<<endl;
             cout<<"del first==cpp"<<endl;
             testMap.erase(it++);
             //cout<<"cpp "<<it->second<<endl;
        }
           
        cout<<it->first << it->second<<endl;
    }
    cout<<"==================================="<<endl;
    // for(auto& var : testMap)
    // {
    // cout<<var.first << " "<<var.second<<endl;
    // }
    
    // for(map<string,string>::iterator it2=testMap.begin();it2!=testMap.end();++it2)
    // {
    //     cout<<it2->first << it2->second<<endl;
    // }
 

    return 0;
}

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