dev-cpp-users

[Dev-C++] File Existence

[Farzan H. <far...@ho...>]

Hi,
I'v written a small program which simulates the DOS command "type". The =20
program receives
a file name form the command line. I used "fail()" function to check =20
existence of the received
file. I have not used "ifstream" functions a lot and I want to know =20
whether this is the
proper way to do so or not.
There is another function called "bad()". Please tell me what kind of =20
errors it can detect.
I tried it in my program and it couldn't check existence of files.

#include <iostream>
#include <fstream>
#include <cstdlib>

using namespace std;

int main(int argc,char* arg[])
{
     if(argc=3D=3D2)
     {
         ifstream File(arg[1]);
         char ch;
         if(File.fail())
             cout << "File not found!\n";
         else
             while(true)
             {
                 File.get(ch);
		if(File.eof())
		     break;
                 cout << ch;
             }
     }
     system("pause>null");
}

Thanks.


--=20
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Re: [Dev-C++] File Existence

[Robert A. <ral...@gm...>]

Check out...

http://www.cplusplus.com/ref/#libs

Then look at fstream and the clear function( which actually
sets/clears statuses)....

Hope this helps,
Robert

On 5/20/05, Farzan Hajian <far...@ho...> wrote:
> Hi,
> I'v written a small program which simulates the DOS command "type". The
> program receives
> a file name form the command line. I used "fail()" function to check
> existence of the received
> file. I have not used "ifstream" functions a lot and I want to know
> whether this is the
> proper way to do so or not.
> There is another function called "bad()". Please tell me what kind of
> errors it can detect.
> I tried it in my program and it couldn't check existence of files.
>=20
> #include <iostream>
> #include <fstream>
> #include <cstdlib>
>=20
> using namespace std;
>=20
> int main(int argc,char* arg[])
> {
>      if(argc=3D=3D2)
>      {
>          ifstream File(arg[1]);
>          char ch;
>          if(File.fail())
>              cout << "File not found!\n";
>          else
>              while(true)
>              {
>                  File.get(ch);
>                 if(File.eof())
>                      break;
>                  cout << ch;
>              }
>      }
>      system("pause>null");
> }
>=20
> Thanks.
>=20
>=20
> --
> Using Opera's revolutionary e-mail client: http://www.opera.com/mail/
>=20
>=20
>=20
>=20
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