Question

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.)

Short answer

The result of rewriting two function declarations without the "using namespace std" statement is as follows: ```cpp void input(std::istream& ins); void output(std::ostream& outs) const; ``` By explicitly specifying the standard namespace ('std::') before 'istream' and 'ostream', the dependency on the "using namespace std" statement has been removed.

Step-by-step solution

Identify the objects from the standard "std" namespace

In the given function declarations, "istream" and "ostream" are objects from the standard "std" namespace. These objects should be explicitly referred to using their namespace to remove the dependency on the "using namespace std" statement.

Rewrite the function declarations with explicit namespace

The function declarations can be rewritten as: ```cpp void input(std::istream& ins); void output(std::ostream& outs) const; ``` Now, they do not need the "using namespace std" statement because "std::" has been added before "istream" and "ostream" to specify the namespace explicitly.