C++ template function default value

Question

Is it possible to define the default value for variables of a template function in C++?

Something like below:

template T sum(T a, T b,         


        

Answer 1

Yes!

However you should at least have an idea about what T could be or it's useless.

You can't set the default value of template parameters for functions, i.e. this is forbidden:

template void f(T a, T b);