Advanced C++ Topics

Operator Overloading

Does it make sense to add two times?

some_return_type operator+(Time a, Time b);

A Time objects represent a point in time, not a duration: what does 3 P.M. + 3 P.M. mean?
It does make sense to add a number of seconds to a Time object, resulting in a new Time object.
```
Time operator+(Time a, int sec)
{
   Time r = a;
   r.add_seconds(sec);
   return r;
}
```