C++ — How to overload operator+=?

Question

Given the following code snippet,

class Num
{
public:
    Num(int iNumber = 0) : m_iNumber(iNumber) {}

    Num operator+=(const Num& rhs)
    {
                 


        

Answer 1

Your operator function could also be written as

Num& operator += (const Num& rhs)
{
   m_iNumber += rhs.m_iNumber;
   return m_iNumber;
}

*this->m_iNumber and m_iNumber by itself within a member function are the same and using the former format is more typing in my opinion.