02-14-2012
sscanf() weired behaviour
Hi with the following code
int a, b;
while ((n = readline (connfd, buf, sizeof(buf)-1)) > 0)
{
buf[n] = '\0';
if (sscanf(buf,"%d %d",&a,&b) != 2)
snprintf (buf, sizeof(buf), "data error\r\n");
else
{
printf("\nRecvd %d and %d",a,b);
snprintf (buf, sizeof(buf), "%ld\r\n", a+b);}
when i check the values "a" gets "0" whereas b gets the correct value. i tried this code outside it works fine out side in independent prog... I am using cygwin.
dataformat in buf = intSPACEint\r\n
---------- Post updated at 02:46 PM ---------- Previous update was at 02:39 PM ----------
ooh its working fine now with the above code.. i was using unsigned short a,b; instead of int ... and %u to get unsigned values....
However it is strnage it doenot use unsigned short ...
thanx for having a look
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STRCPY(3) BSD Library Functions Manual STRCPY(3)
NAME
stpcpy, strcpy, strncpy -- copy strings
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
char *
stpcpy(char *s1, const char *s2);
char *
strcpy(char *restrict s1, const char *restrict s2);
char *
strncpy(char *restrict s1, const char *restrict s2, size_t n);
DESCRIPTION
The stpcpy() and strcpy() functions copy the string s2 to s1 (including the terminating '