[Dev-C++] How do I "reopen" cin?

[Luigi S. <gi...@li...>]

Hi !

Can anybody help me solve this silly problem with C++?

Suppose that I should write a program, named "copy_file", which supports 
the following syntax:

    command                        what it does
-------------               -----------------------
   copy_file                   copy cin on cout
   copy_file input             copy the file named "input" on cout

It would be nice to have the work done by these two steps:
    - if you find a file name on the command line then attach cin to the file
    - copy cin on cout

How do I "reopen" cin? (or, to make it clearer: is there a C++ equivalent 
of the C function freopen?)

Any solution will be appreciated.

--
gisan