This is the IDE's fault, add the function prototype above the definition:
template<class TYPE> TYPE Add(TYPE n1, TYPE n2);
The IDE otherwise generates a prototype as:
TYPE Add(TYPE n1, TYPE n2);
leaving TYPE as undefined.
This is the IDE's fault, add the function prototype above the definition:
template<class TYPE> TYPE Add(TYPE n1, TYPE n2);
The IDE otherwise generates a prototype as:
TYPE Add(TYPE n1, TYPE n2);
leaving TYPE as undefined.