Final answer:
The question is about overloading various operators for a user-defined class in a programming language like C++, excluding those that would not make logical sense to overload, such as member access or sizeof operators.
Step-by-step explanation:
The question is asking to overload all operators for a class, presumably called ATC (which might stand for a user-defined type or class in programming), with the exception of operators that do not make sense to overload. In object-oriented programming, especially in languages like C++, operators can be overloaded to provide custom behavior when they are used with objects of user-defined classes. Overloading operators can include unary operators (like - and !), shortcut arithmetic operators (like += and *=), relational operators (like < and ==), streaming operators (like << and >>), and postfix/prefix increment and decrement operators (++ and --). However, certain operators, such as the member access operators (. and ->), the scope resolution operator (::), and the sizeof operator, typically cannot be overloaded because they are integral to the language syntax itself or have fixed behavior.