Most can be overloaded. The only C operators that can’t be are
sizeof, which is technically an operator). C++ adds a few of its own operators, most of which can be overloaded except
There is no fundamental reason to disallow the overloading of
?:. So far the committee just hasn’t seen the need to introduce the special case of overloading a ternary operator. Note that a function overloading would not be able to guarantee that only one of
expr3 was executed.
sizeof cannot be overloaded because built-in operations, such as incrementing a pointer into an array implicitly depends on it.
&,*,«,» can be overload so correct answer is