y and z are user-defined objects and the += operator is an overloaded member function. The operator is overloaded such that y += z adds z and y, then stores the result in y. Which of the following expressions is always equivalent to y += z?

Question

a. y = y operator+= z
b. y.operator+=(z)
c. y = y + z
d. y operator+=(y + z)

Answer 1

b. y.operator+=(z)