When a layer contains sublayers, a(n) ____________________ appears on the left-hand side of the layer.

Answer the following statements true (T) or false (F)

1. In a class template implementation, every use of the class name as the name of the class should be followed by . 2. All classes should be converted to templates 3. Templates are an example of algorithm abstraction 4. A class template may not use dynamic memory allocation. 5. In a template, all members must be private

What is the correct signature for a function that converts a Rational to double?

a. double operator() b. operator double() c. Rational operator double() d. double operator double()