I'm trying to create filenames using day of year and time such as
298140132.log.  I'm taking the date and time integers from a tm struct
and trying to cast them to strings and concatenate them into the
desired file name.  However, when I compile the following code:

#include <stdio.h>
#include <time.h>

int main(void)
{

time_t CurrentTime;
struct tm  now;
char day[4], hour[3], min[3], sec[3];

CurrentTime = time(NULL);
strcpy(time_string, ctime(&CurrentTime));
now = *localtime(&CurrentTime);

//  ALL'S FINE UP TO HERE

strcpy(day, (char)now.tm_yday);

printf("Day is %s\n", day);
:
:
:
 I get the following warning:

warning: passing arg 2 of 'strcpy' makes pointer of integer without a
cast

Am I trying to do this the impossible way?  Any help will be greatly
appreciated.

Kent

| Hi,
|
| I'm trying to create filenames using day of year and time such as
| 298140132.log.  I'm taking the date and time integers from a tm struct
| and trying to cast them to strings and concatenate them into the
| desired file name.  However, when I compile the following code:
|
| #include <stdio.h>
| #include <time.h>
|
| int main(void)
| {
|
| time_t CurrentTime;
| struct tm  now;
| char day[4], hour[3], min[3], sec[3];
|
| CurrentTime = time(NULL);
| strcpy(time_string, ctime(&CurrentTime));
| now = *localtime(&CurrentTime);
|
| //  ALL'S FINE UP TO HERE
|
| strcpy(day, (char)now.tm_yday);

now.tm_yday is not a string and casting it to a *char* doesn't change that
situation.  What you really want is

sprintf( day, "%d", now.tm_yday );

|
| printf("Day is %s\n", day);
| :
| :
| :
|  I get the following warning:
|
| warning: passing arg 2 of 'strcpy' makes pointer of integer without a
| cast
|
| Am I trying to do this the impossible way?  Any help will be greatly
| appreciated.
|
| Kent

  sprintf(day, "%s", now.tm_yday);

---
John Gordon                  "No Silicon Heaven?  Preposterous!  Where would

you should have a look at the tm - struct's member types. I dont recall at
the moment, but I think tm.tm_yday is an int, so you will have to convert
it to a character string before using strcat. sprintf will do the job

good luck
Robert

--
-----------------------------------------


-----------------------------------------

Kent

What you want to do is use the strftime() (especially read about the %j
conversion) and sprintf(). Try writing some code with these two functions.
If you still have problems post your code here.

Paul

--
Paul D. Boyle

North Carolina State University
http://laue.chem.ncsu.edu/web/xray.welcome.html