Define a function called sendLine that takes one argument that is an output
stream. When called, sendLine reads one line of input from the keyboard
and outputs the line to the output stream given as its argument. You should
be able to call your function using either cout or an output-file stream as
the argument to your function sendLine. (If the argument is an output-file
stream, then the stream is connected to a file before the function is called,
so sendLine will not open or close any files.) For example, the first of the
following calls to sendLine copies a line from the keyboard to the file
morestuf.dat, and the second copies a line from the keyboard to the screen:
ofstream fout;
fout.open("morestuf.dat");
cout <>
sendLine(fout);
sendLine(cout);