In all questions involving function headers, be sure to think of whether function arguments and return values should be references, whether they should be const, etc. (Remember that a method or function header is the first line of the method or function definition/implementation.)

Given the class Thing, write the header for a standalone function that overloads the less than operator. Assume the operator compares two Thing objects.

Given the class Thing, write the header for a method that overloads the less than operator. Assume the operator compares two Thing objects.

What is a friend in C++?

Where is the friend keyword coded in C++?

Write the standalone function header for overloading the output operator for the Thing class.

When and how can a method be declared const?

Given the class Simple, write the header for a standalone function that overloads the multiplication operator. Assume the operator multiplies two Simple objects to get a Simple result.

Given the class Simple, write the header for a method that overloads the multiplication operator. Assume the operator multiplies two Simple objects to get a Simple result.