cout                 Output Stream


        In C++, cout corresponds to stdout. You can work with cout like
    this: cout<<x, where x is a data type or object, and << is the
    overloaded left shift operator, also called the insertion operator
    in C++. Note that cout is also an alias for ostream_withassign, and
    that it is buffered.

    Note:   You can also chain the use of << and >> like this:
            cout << "This is the value of x:" << x << "\n"; You do not
            need to worry about the type of the arguments you pass
            -- the << and >> operators are overloaded to handle all
            standard types, and you can even overload them for your own
            types.

            In addition, you can format output with the cout.setf()
            member function -- see Formatting for more details.