Chapter 12.2, Problem 11STE

Consider the following function declarations from the definition of the class Money in Display 11.4.

  void input(istream& ins);

  void output(ostream& outs) const;

  Rewrite these function declarations so that they do not need to be preceded by

  using namespace std;

  (You do not need to look back at Display 11.4 to do this.)