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Re: variable string in attribute and char variables

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  • Subject: Re: variable string in attribute and char variables
  • Date: Tue, 04 Feb 2003 07:58:58 -0700
>To: address@hidden
>From: Igor Pesenson <address@hidden>
>Subject: Re: 20030203: subject
>Organization: Lawrence Berkeley National Laboratory
>Keywords: 200302031956.h13Ju0623075

Igor,

> Thank you Russ, someday I'll get the array/pointer deall all correct. My date 
> string is declared
> as:
> 
> char base_time_str[25];
> 
> And initialized as:
> 
> strftime(base_time_str,25,"%d-%b-%Y,%H:%M:%S GMT", &timestruct);
> 
> Where timestruct is of type (struct tm). Anyhow, base_time_str ends up a very 
> nicely formed
> string.
> Then my code says:
> 
> nc_status=nc_def_var(ncid,"base_time",NC_INT,0,&idimid,&ivarid[1]);
> nc_status=nc_put_att_text(ncid,ivarid[1],"string",25,base_time_str);
> 
> However, the output looks as:
> 
>         int base_time ;
>                 base_time:string = "" ;
> 
> What am I missing? I'm sorry to be pounding this to death, but I haven't been 
> able to get very
> far with all this in the last few days. Thank you,
> Igor.
> PS Playing with your solution to my other issue of the 15-long binary flags 
> was very intersting
> is worked great. Thanks!

It doesn't look like there is anything wrong with your nc_put_att_text
call, so I suspect by the time it is called, base_time_str doesn't
contain what you think it should have in it.

Could I get you to print the value of base_time_str just before the
call by inserting a printf() call:

 nc_status=nc_def_var(ncid,"base_time",NC_INT,0,&idimid,&ivarid[1]);
 printf("base_time_str is '%s'", base_time_str);
 nc_status=nc_put_att_text(ncid,ivarid[1],"string",25,base_time_str);

It might also be a good idea to check the status returned by these
calls, since that's the only way run-time errors can be detected.

--Russ

_____________________________________________________________________

Russ Rew                                         UCAR Unidata Program
address@hidden                     http://www.unidata.ucar.edu