operator= fixed

ex01/RPN.cpp

@@ -31,7 +31,7 @@ RPN& RPN::operator=(const RPN &other)
 {
     if (this != &other)
     {
-        // Copy attributes here
+        this->numbers = other.numbers;
     }
     // std::cout << "RPN copy assignment operator called" << std::endl;
     return (*this);