datetime string to seconds error

"

Code:

---

time_t epoch;
struct tm tm;

if (strptime("2011-10-23 08:46:10", "%Y-%m-%d %H:%M:%S", &tm) != NULL)  {
  epoch = mktime(&tm);
} else {
    // Handle error
}

printf("seconds since the Epoch: %ld\n", (long) epoch);

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I want to convert the string "2011-10-23 08:46:10" to seconds. Why am I getting this error with this code. warning: comparison between pointer and integer [enabled by default] for line

Code:

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if (strptime("2011-10-23 08:46:10", "%Y-%m-%d %H:%M:%S", &tm) != NULL)  {."

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You may have to put the following define before your any of your include files

Code:

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#define _XOPEN_SOURCE

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in order to use this function.

Jim

Are you compiling on Linux?

Quote:

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Originally Posted by man page

STRPTIME(3) Linux Programmer's Manual STRPTIME(3)

NAME
strptime - convert a string representation of time to a time tm structure

SYNOPSIS
#define _XOPEN_SOURCE /* glibc2 needs this */
#include <time.h>

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yes, I am compiling on linux

That solved it. Thanks