How to access elements of a C++ map from a pointer?

You can do this:

(*myFruit)["apple"] = 1;

or

myFruit->operator[]("apple") = 1;

or

map<string, int> &tFruit = *myFruit;
tFruit["apple"] = 1;

or (C++ 11)

myFruit->at("apple") = 1;