help with sscanf()! Post: 302308257

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Top Forums Programming help with sscanf()! Post 302308257 by Zykl0n-B on Friday 17th of April 2009 01:28:28 PM

04-17-2009

Zykl0n-B

Guest

help with sscanf()!

Hi everybody,

i need help with this function, i'm programming in CGI with C and i can't make this work.

QUERY_STRING is something like: user=MYUSER&pass=MYPASS

So, what i want is to store the strings containing the username and the password into str1 and str2 respetively, here's the code:

Code:

#include <stdio.h>
#include <stdlib.h>
 
int main(void){
char *data, *str1, *str2;
 
/*... HTML stuff ...*/
 
data = getenv("QUERY_STRING");
 
if(data==NULL){
printf("<H1>Error passing data to CGI Script</H1>");
exit(1);
}
 
else
sscanf(data, "user=%s&pass=%s", &str1, &str2);
 
printf("Username: %s\n", str1);
printf("Password: %s\n", str2);
return(0);
}

But i'm getting an error... it works perfectly with numbers, but i need it to work like this, with strings.
Am i missing something? Please, help me!!!

Last edited by Zykl0n-B; 04-17-2009 at 02:33 PM..

Zykl0n-B

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LEARN ABOUT PHP

strnatcmp

STRNATCMP(3)								 1							      STRNATCMP(3)

strnatcmp - String comparisons using a ";natural order" algorithm

SYNOPSIS

       int strnatcmp (string  $str1, string  $str2)

DESCRIPTION

	This  function	implements  a comparison algorithm that orders alphanumeric strings in the way a human being would, this is described as a
       "natural ordering". Note that this comparison is case sensitive.

PARAMETERS

	      o $str1
		- The first string.

	      o $str2
		- The second string.

RETURN VALUES

	Similar to other string comparison functions, this one returns < 0 if $str1 is less than $str2; > 0 if $str1 is greater than $str2, and  0
       if they are equal.

EXAMPLES

	An  example  of  the  difference between this algorithm and the regular computer string sorting algorithms (used in strcmp(3)) can be seen
       below:

       <?php
       $arr1 = $arr2 = array("img12.png", "img10.png", "img2.png", "img1.png");
       echo "Standard string comparison
";
       usort($arr1, "strcmp");
       print_r($arr1);
       echo "
Natural order string comparison
";
       usort($arr2, "strnatcmp");
       print_r($arr2);
       ?>

       The above example will output:

       Standard string comparison
       Array
       (
	   [0] => img1.png
	   [1] => img10.png
	   [2] => img12.png
	   [3] => img2.png
       )

       Natural order string comparison
       Array
       (
	   [0] => img1.png
	   [1] => img2.png
	   [2] => img10.png
	   [3] => img12.png
       )

SEE ALSO

       preg_match(3), strcasecmp(3), substr(3), stristr(3), strcmp(3), strncmp(3), strncasecmp(3), strnatcasecmp(3), strstr(3),  natsort(3),  nat-
       casesort(3).

PHP Documentation Group 													      STRNATCMP(3)