my doubts in C

[geese786@gmail.com]

int fp

fp = fopen ( "r , "abc.txt);;

it is giving error "file not opening"

[Chris Dollin]

Re: my doubts in C

geese786@gmail. com wrote:

int fp
>
fp = fopen ( "r , "abc.txt);;
>
it is giving error "file not opening"

I find this highly surprising, since the code isn't remotely
compilable.

If one hallucinates that fp is a FILE*, and that the code
appears within, say, main, and that the fopen call repairs
to

fp = fopen( "r", "abc.txt" );

to get that problem report, then I'd expect it to be because
there's no file called `r` to open.

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[John Bode]

Re: my doubts in C

On Apr 2, 7:49 am, geese...@gmail. com wrote:

int fp
>
fp = fopen ( "r , "abc.txt);;
>
it is giving error "file not opening"

Ignoring the obvious syntax errors, the problem is that you have your
parameters reversed. It *should* be

fp = fopen("abc.txt" , "r");

What reference manual are you using?

[CBFalconer]

Re: my doubts in C

geese786@gmail. com wrote:

>
int fp
>
fp = fopen ( "r , "abc.txt);;
>
it is giving error "file not opening"

Sounds like a reasonable response to that code.

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[page]: <http://cbfalconer.home .att.net>
Try the download section.



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[Kenneth Brody]

Re: my doubts in C

Chris Dollin wrote:

>
geese786@gmail. com wrote:
>

int fp

fp = fopen ( "r , "abc.txt);;

it is giving error "file not opening"

>
I find this highly surprising, since the code isn't remotely
compilable.
>
If one hallucinates that fp is a FILE*, and that the code
appears within, say, main, and that the fopen call repairs
to
>
fp = fopen( "r", "abc.txt" );
>
to get that problem report, then I'd expect it to be because
there's no file called `r` to open.

[Ignoring the trolling of the OP...]

7.19.5.3p3 states:

If the string is one of the following, the file is open in the
indicated mode. Otherwise, the behavior is undefined.

It is perfectly acceptable that the UB outputs "file not opening"
as a result of this, once the obvious syntax errors are "fixed",
whether or not a file named "r" exists. :-)

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