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 BSD

strstr

STRSTR(3)						     Library Functions Manual							 STRSTR(3)

NAME

       strstr - locate a substring in a string

SYNOPSIS

       #include <string.h>

       char *
       strstr(big, little)
       char *big, *little;

DESCRIPTION

       The  strstr()  function	locates the first occurrence of the null-terminated string little in the null-terminated string big.  If little is
       the empty string, strstr() returns big; if little occurs nowhere in big, strstr() returns NULL; otherwise strstr() returns a pointer to the
       first character of the first occurrence of little.

SEE ALSO

       index(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strtok(3)

STANDARDS

       The strstr() function conforms to ANSI C X3/159-1989 (``ANSI C'').

4.4 Berkeley Distribution					 January 15, 1996							 STRSTR(3)