• "David Grimes" <dgrimes friberg.us> Feb 15 2004
• "David Grimes" <dgrimes friberg.us> Feb 17 2004

1.c:
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

int main(int argc, char *argv[])
{
unsigned long number = strtoul(argv[1], 0, 10);

if (errno)
{
perror("Incorrect integer value");
return 1;
}

printf("number = %lu\n", number);
return 0;
}

dmc 1.c & 1 abc
number = 0

Function strtoul doesn't set errno if the conversion can not be performed.

David

This is the correct behaviour according to the standard. (There is an
erratum in the description of the function in my C book)

David

"David Grimes" <dgrimes friberg.us> wrote in message
news:c0p42c$2vfh$1 digitaldaemon.com...
 1.c:
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>

 int main(int argc, char *argv[])
 {
 unsigned long number = strtoul(argv[1], 0, 10);

 if (errno)
 {
 perror("Incorrect integer value");
 return 1;
 }

 printf("number = %lu\n", number);
 return 0;
 }

 dmc 1.c & 1 abc
 number = 0

 Function strtoul doesn't set errno if the conversion can not be performed.

 David