[ CPP ] Find a key in a map without inserting value

find_key_in_mapp_cpp.cpp

//##################### CLASSIC MAP ###############################
std::map<std::string,std::string> map;

if (map.find(key)!=map.end()){
   //key was found
}
else{
   //key not found
}
//#################### POINTER MAP #################################
std::map<std::string,std::string> *map_ptr;
std::map<std::string,std::string> map_val=*map_ptr;

if (map_val.find(key)!=map.end()){
   //key was found
}
else{
   //key not found
}

//if (strcmp(map[key],"")!="") => will insert key if not exists