ya, you are right, but it returns -1 when it reaches the end of file.
On Sat, Jul 23, 2011 at 9:15 AM, arun kumar <kumar0...@gmail.com> wrote:
> @shady:i have a doubt. scanf returns number of succesfully read words.
> how come it will return -1?
>
> On Sat, Jul 23, 2011 at 12:17 AM, geek forgeek <geekhori...@gmail.com>
> wrote:
> > @shady and @varun ...
> > i hav got it
> > thanx both of u :)
> >
> > On Fri, Jul 22, 2011 at 11:31 AM, shady <sinv...@gmail.com> wrote:
> >>
> >> @aditi the problem is scanf returns -1(EOF value) when it encounters the
> >> end of file, and inspite of comparing the return value of scanf he is
> >> comparing value of character 'a' which is not correct....
> >> therefore the for loop should be like this :::::::::::::::::::::::::
> >> for(int t=scanf("%c",&a);t!=EOF;t=scanf("%c",&a))
> >> what varun suggested is another way of doing it :)
> >>
> >> On Fri, Jul 22, 2011 at 11:41 PM, aditi garg <aditi.garg.6...@gmail.com
> >
> >> wrote:
> >>>
> >>> @shady. so in this case we shud use a!=-1 as the condition??
> >>>
> >>> On Fri, Jul 22, 2011 at 11:37 PM, shady <sinv...@gmail.com> wrote:
> >>>>
> >>>> you are scanning from stdin therefore it is not coming out of first
> for
> >>>> loop... because your terminating condition is for EOF, which is -1(
> scanf
> >>>> returns -1 ) at the end.
> >>>>
> >>>> On Fri, Jul 22, 2011 at 11:34 PM, shady <sinv...@gmail.com> wrote:
> >>>>>
> >>>>> well you didn't mention the question, directly posted the code with
> no
> >>>>> head-tail... wait will answer, it is not coming out of first loop
> >>>>>
> >>>>> On Fri, Jul 22, 2011 at 11:26 PM, geek forgeek <
> geekhori...@gmail.com>
> >>>>> wrote:
> >>>>>>
> >>>>>> @shady this is nt a joke..
> >>>>>> sorry if i am asking too stupid question
> >>>>>> i m getting an infinite loop here.
> >>>>>> not getting how?
> >>>>>>
> >>>>>> On Fri, Jul 22, 2011 at 10:40 AM, shady <sinv...@gmail.com> wrote:
> >>>>>>>
> >>>>>>> what kind of joke is this ?
> >>>>>>>
> >>>>>>> On Fri, Jul 22, 2011 at 11:02 PM, geek forgeek
> >>>>>>> <geekhori...@gmail.com> wrote:
> >>>>>>>>
> >>>>>>>> #include<stdio.h>
> >>>>>>>> main()
> >>>>>>>> {
> >>>>>>>> FILE *fp;
> >>>>>>>> char a;
> >>>>>>>> fp=fopen("old.out","w");
> >>>>>>>> if(fp==0)
> >>>>>>>> printf("File opening error");
> >>>>>>>> else
> >>>>>>>> {
> >>>>>>>> for(scanf("%c",&a);a!=EOF;scanf("%c",&a))
> >>>>>>>> fprintf(fp,"%c",a);
> >>>>>>>> fclose(fp);
> >>>>>>>> fp=fopen("old.out","r");
> >>>>>>>> while(!feof(fp))
> >>>>>>>> putchar(getc(fp));
> >>>>>>>> }
> >>>>>>>> }
> >>>>>>>>
> >>>>>>>> --
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> >>>
> >>>
> >>>
> >>> --
> >>> Aditi Garg
> >>> Undergraduate Student
> >>> Electronics & Communication Divison
> >>> NETAJI SUBHAS INSTITUTE OF TECHNOLOGY
> >>> Sector 3, Dwarka
> >>> New Delhi
> >>> 9718388816
> >>>
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