A C++ program with user-defined variables

Question

I'm writing a code that implements simple command line calculator, and I wanted to add a function for user to create his own variables with numeric values for better calculations. Can anyone share any advice, what technique should I use? I thought about creating an allocated two-dimensional string array and later just converting numeric values or use a template, something like that:

template<class T>
void UserVariables(T varname, T varvalue){
T tArray[2][MAX_VARS]={ {varname1, varvalue1}, {varname2, varvalue2}, ... };
....
}

Maybe there are any better and less noobie-ish decisions out there? Thanks in advance.

Answer 1

Your options are here:

std::unordered_map

std::map

std::unordered_multimap

std::multimap

Answer 2

I don't see how your attempt would work - templates are evaluated at compile time, not run time, so the user can't make new variables one the code is running.