Inside a function definition for a member function of an object with data member x, which of the following is not equivalent to this-x:
A) *this.x
B) (*this).x
C) x
D) None of the above are equivalent.

Question

Inside a function definition for a member function of an object with data member x, which of the following is not equivalent to this->x:
A) *this.x
B) (*this).x
C) x
D) None of the above are equivalent.

Quizplus · Accepted Answer

The dot operator (.) and arrow operator (->) can be used to access member variables or functions of an object. In a member function of an object, this keyword is a pointer to the object itself. this->x means "access member variable x of the object that this points to". Option A, *this.x, is incorrect because it tries to access the x variable using the dot operator on a pointer to the object rather than the arrow operator. The correct syntax to access the member variable x using a pointer is (*this).x. Option C, x, is also incorrect because it is not using this pointer and instead is accessing a variable x that is not a member of the object. Therefore, the answer is A).

Inside a Function Definition for a Member Function of an Object