help with sscanf Post: 302383090

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Top Forums Programming help with sscanf Post 302383090 by botao on Monday 28th of December 2009 10:11:19 AM

12-28-2009

Registered User

you're missing a point ...

remember: you asked sscanf to match a pattern, and it will ;

what sscanf will not do, is to search (crawl) for a pattern, for this is the purpose of strstr ... see below:

Code:

#include <stdio.h>
#include <string.h>
int main(void) {
	char A[5000] = "";
	float B = 0;
	char * begin;

	strcat(A, "		hello world! WORD' name='5.3498' hello world!            ");
	begin = strstr (A, "WORD'") ;
	sscanf(begin, "WORD' name='%f", &B); // how can I match all chars before WORD and after the float ?

	printf("%f\n", B);

	return 0;
}

- strstr will actually find the beginning of the pattern to match, and sscanf will do what it does best: just scan ...

ok ?

good luck, and success !

alexandre botao

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LEARN ABOUT OSF1

strstr

strstr(3)						     Library Functions Manual							 strstr(3)

NAME

       strstr - Finds a substring

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <string.h>

       char *strstr(
	       const char *s1,
	       const char *s2);

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       strstr():  ISO C, XPG4, XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS

       Specifies the character string being searched.  Specifies the substring to be located.

DESCRIPTION

       The  strstr()  function	locates  the  first occurrence in the string pointed to by the s1 parameter of the sequence of bytes in the string
       pointed to by the s2 parameter, excluding the terminating null character.

RETURN VALUES

       On successful completion, the strstr() function returns a pointer to the located string or a null pointer if the string is not found.  When
       the s2 parameter points to a string having 0 (zero) length, the strstr() function returns the string pointed to by parameter s1.

RELATED INFORMATION

       Functions: string(3), wcsstr(3), wcswcs(3)

       Standards: standards(5) delim off

																	 strstr(3)