How to use scanf() for input 2 strings ended of EOF?

[Alex]

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

[Kenny McCormack]

In article <11*********************@m73g2000cwd.googlegroups. com>,
Alex <ar******@gmail.comwrote:

>The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

How nice for it.

[Nick Keighley]

Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

maybe you want to look at fgets() and sscanf()?

--
Nick Keighley

[Chris Dollin]

Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

(If EOF didn't terminate it, it wouldn't be called *E*OF; it seems a bit
redundant to say that.)

So the input is required to have no line-end characters? That seems ...
unwise.

--
Chris "remember Indiana 3" Dollin
"I'm still here and I'm holding the answers" - Karnataka, /Love and Affection/

[Richard Bos]

Chris Dollin <ch**********@hp.comwrote:

Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

(If EOF didn't terminate it, it wouldn't be called *E*OF; it seems a bit
redundant to say that.)

So the input is required to have no line-end characters?

Where do you read that?

Richard

[Konstantin Miller]

Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

man sscanf or google sscanf

double a, b;
if( 2 != sscanf(input, "%lf %lf", &a, &b) ) printf("error\n");

Konstantin

[Chris Dollin]

Richard Bos wrote:

Chris Dollin <ch**********@hp.comwrote:

>Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

(If EOF didn't terminate it, it wouldn't be called *E*OF; it seems a bit
redundant to say that.)

So the input is required to have no line-end characters?

Where do you read that?

Because the spec doesn't appear to allow it:

>>The input contains two strings alphanumeric ASCII characters
separated by whitespace. Input is terminated by EOF."

There's nothing in there that allows whitespace (of which end-of-line,
aka \n, is an instance) after the second alphanumeric string.

It's probably a buggy specification, although some people might take
the position that it's a picky reading.

--
Chris "pleasing coincidence" Dollin
Nit-picking is best done among friends.

[Chris Dollin]

Chris Dollin wrote:

Richard Bos wrote:

>Chris Dollin <ch**********@hp.comwrote:

>>Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

(If EOF didn't terminate it, it wouldn't be called *E*OF; it seems a bit
redundant to say that.)

So the input is required to have no line-end characters?

Where do you read that?

Because the spec doesn't appear to allow it:

>>>The input contains two strings alphanumeric ASCII characters
separated by whitespace. Input is terminated by EOF."

There's nothing in there that allows whitespace (of which end-of-line,
aka \n, is an instance) after the second alphanumeric string.

It's probably a buggy specification, although some people might take
the position that it's a picky reading.

.... and I see that of course it allows end-of-lines /between/ the
tokens. Just not at the end.

A sloppy picky reading, then.

Blame it on the latte's confounded absence.

--
Chris "at least it's nearly tea-time" Dollin
The shortcuts are all full of people using them.

[kondal]

Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

char buf[1000]="";
int len = 1000; /*length of the strings combined. */
fread(buf, len, 1, stdin);

Then use strtok to get the individual strings.

Hope this works!

[Robert Gamble]

Konstantin Miller wrote:

Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

man sscanf or google sscanf

double a, b;
if( 2 != sscanf(input, "%lf %lf", &a, &b) ) printf("error\n");

*strings*, not floating point numbers.

Robert Gamble

[kondal]

kondal wrote:

Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

char buf[1000]="";
int len = 1000; /*length of the strings combined. */
fread(buf, len, 1, stdin);

Then use strtok to get the individual strings.

Hope this works!

if the length of the strings isn't known, you can read and fill the
buffer till eof is reached using feof function.

[Keith Thompson]

"kondal" <ko******@gmail.comwrites:

kondal wrote:

>Alex wrote:

The input contains two strings alphanumeric ASCII characters separated
by whitespace. Input is terminated by EOF.

char buf[1000]="";
int len = 1000; /*length of the strings combined. */
fread(buf, len, 1, stdin);

Then use strtok to get the individual strings.

Hope this works!

if the length of the strings isn't known, you can read and fill the
buffer till eof is reached using feof function.

feof() probably isn't what you want. fread() returns the number of
items succesfully read; if its return value is less than the number of
items requested, you can *then* use feof() to find out whether it was
because you reached the end of the file or because of an error.

--
Keith Thompson (The_Other_Keith) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.