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

Write the body like you did. Use the operator like you did. The operator should return a reference to allow chaining.

See here.