An overloaded + operator takes a class object and a double as operands. For it t

Question

An overloaded + operator takes a class object and a double as operands. For it to be commutative (i.e., a + b and b + a both work): Select one: It must be overloaded twice; the operator+ function that takes the object as the left operand must be a member function, and the other operator+ function must be a global function. The +operator cannot be overloaded to be commutative. operator+ must be a non-member function. operator+ must be a member function of the class from which the objects are instantiated.

Explanation / Answer

An overloaded + operator takes a class object and a double as operands. For it to be
communicative (i.e., a + b and b + a both work):
   c. operator+ must be a non-member function.
   And it should be defined twice. like:
   operator+(ClassObject, double);
   operator+(double, ClassObject);

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