Question

12. Why would a programmer want to overload operators rather than use regular member functions to perform similar operations?

13. What is passed to the parameter of a class’s operator= function?

14. Why shouldn’t a class’s overloaded = operator be implemented with a void operator function?

Answer 1

12)
Overloading operators permits you to define/use various operators behavior when used with a class object.
for example we can define operator overloading functions make objects of the class work with known operators.
examples of such operators are << >> + -

13)
The object on the right side of the = operator in the statement that called the overloaded operator function.
Type of this parameter is const reference to object of same class.

14)
because to support compound assignments in a single statement.
for example to support obj1 = obj2 = obj3, we need to return reference of object as return type from assignment operator.