From: "Tim Nicholson" <T DOT J DOT Nicholson AT btinternet DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: trouble with pointers
Date: Thu, 19 Apr 2001 19:07:15 +0100
Organization: Skyforce avionics Limited
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Could someone please explain what I getting wrong here (I am using DJGPP and
Rhide). I get a warning error with example one but not with example two or
three. It is example one that I want to use. I could use example to, but why
is the cast required.  Example three is not what I want but it does
highlight something (i think).

Regards

Tim

-----Example one--------------------
#include "time.h"

static struct tm *mytime_t;
static unsigned int mytod;

void my_get_time(void)
{
    time(&mytod);
    mytime_t = gmtime(&mytod);  <=== Warning error - why?
 }

WARNING - assignment makes an integer from a pointer without cast (or words
to that effect)

----Example two---------------------
#include "time.h"

static struct tm *mytime_t;
static unsigned int mytod;

void my_get_time(void)
{
    time(&mytod);
    mytime_t = (struct tm*) gmtime(&mytod);
}

No errors reported

----Example three--------------------
#include "time.h"

static unsigned int mytod;

void my_get_time(void)
{
struct tm *mytime_t;

    time(&mytod);
    mytime_t = (struct tm*) gmtime(mytof);
 }

No errors reported