C++ Few written questions. Rating helpful solutions thumbs up.

2. A class, circle, has private member variables, radius (a double) and area (a double). Write the operator overloading function (using class member functions, not friend functions) for such that adding two circles together will result in a circle that has the sum of the radii from both circles and the appropriate area. You may assume PI is a global constant that has been defined. No prototypes are needed. 3. What operator is already defined for every class but can be overwritten? Why would one overwrite it