Any better solution? Taking your question literally, no. There is no better solution. This will create a default constructed, and therefore empty std::map<int,int>. std::map<int,int> m; solved How to create an empty std::map object? [closed]
Find for std::map only takes a key value. So you would call it like this: if (purchase_list.find(“SearchName”) != purchase_list.end()) std::cout << “SearchName found!!” << std::endl; 0 solved c++ find a key match in a bi-dimensional map (map of map)
Maybe your myMap is no longer accessible. For instance, it might be a reference to a deleted pointer, or, much more probable, a member variable of an already deleted class: class MyClass { public: selfInsert(std::string myKey) { if(!myKey.empty()) { myMap[myKey] = this; } } private: std::map<std::string, myClass*> myMap; } int main() { MyClass *a = … Read more