Several additional operators have a slightly different syntax for overloading.

The subscript, operator[ ], must be a member function and it requires a single argument. Because operator[ ] implies that the object it’s being called for acts like an array, you will often return a reference from this operator, so it can be conveniently used on the left-hand side of an equal sign. This operator is commonly overloaded; you’ll see examples in the rest of the book.

The operators new and delete control dynamic storage allocation and can be overloaded in a number of different ways. This topic is covered in the Chapter 13.