map挿入、検索、削除

gistfile1.cpp

/////////////// insert

users.insert( map<string, UserClass>::value_type( str, UserClass( args.. ) ) );

////////// loop access

map<string, UserClas>::iterator it = users.begin();
while( it != users.end() ) {
    cout << "key : " << (*it).first << " value : " << (*it).second << endl;
    ++it;
}

/////////////// search

map<string, UserClass>::iterator it = users.begin();
while( it != users.end() ) {
    string key = (*it).first;
    if ( users.end() != users.find( key ) ) { //or if ( "KEY" == key )   
        cout << "key : " << (*it).first << " value : " << (*it).second << endl;
    }
    ++it;
}


//////////////// erase

map<string, UserClass*>::iterator it = users.begin();
while( it != users.end() ) {
    string key = (*it).first;
    if ( users.end() != users.find( key ) ) {    
        users.erase(it++);
        cout << "erase __ : " << key << endl;
        break;
    } else {
        ++it;
    }
}