Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++'

How is the postfix increment operator differentiated from the prefix increment when overloading?

1. It has a return type of void

2. It takes an additional 'int' parameter

3. It returns a constant

4. It is defined outside the class

The correct answer is: It takes an additional 'int' parameter

The postfix increment operator is unlike the prefix increment operator because it takes an additional 'int' parameter. This is necessary because the postfix operator returns a copy of the original value before it is incremented, whereas the prefix operator increments the value before returning it. The other options are incorrect for various reasons A is incorrect because the return type is not what differentiates the operators, C is incorrect since neither operator returns a constant, and D is incorrect because both operators can be defined inside or outside of the class.