fopen

[sf123]

Hi!

Is it fine to have f_output = fopen("output.txt", "w");

without the:

if(f_output == NULL){
printf("\nFile input.txt was not found!!");
printf("\nFind the file and select again.\n");

break;
}

?

since it is for writing it would create a file named output.txt right?
so theres no need for if (f_ouput == NULL) right?

[DSLq5Di1]

There is a multitude of reasons for fopen to fail:-
http://pubs.opengroup.org/onlinepubs/009695399/functions/fopen.html#tag_03_176_05

[sf123]

I think it doesnt answer my question. Can you just tell me if what I will be doing is fine?

[Duthomhas]

You have mis-read a direct answer to your question.
You need to check, because there are many reasons that fopen() can fail, even for creating/overwriting a file.

[Galik]

The check if(f_output == NULL) is important for the reasons already give to you. What you do then is up to you. The error message in your example is inappropriate because you are creating a file rather than looking for one. But you should still do something if opening the file fails.

[sf123]

Thanks for the answers.

Ok I'll just put an error "File creating failed".

Thanks!