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Time as a null-terminated string.

Posted on 1999-12-07
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Last Modified: 2012-06-21
How do I get the local time in the format HH:MM:SS into a null-terminated string using MS Visual C++ 4?  I know how to use GetLocalTime() to fill up the structure, but how do I convert the hours, minutes and seconds into a simple null-terminated string separated by colons and append the terminating zero?  Could you please post some C++ source code which will do this.

Thanks
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Question by:Richard2000
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jkr earned 200 total points
ID: 2261674
If you insist in using 'GetLocalTime()', the solution is

SYSTEMTIME st;
char acTime [ 256];

GetLocalTime ( &st);

  sprintf(acTime,"%d:%d:%d\n",st.wHour,st.wMinute,st.wSecond);


Or you could use

BOOL GetTimeStamp( char *pcBuffer, unsigned short usBufSize)
{
 time_t         Sec70;
 struct tm     *pActTime;

 char           acTimeStamp[MAX_TIMESTAMP +1];

    if ( MAX_TIMESTAMP +1 < usBufSize ) return(FALSE);

    time( &Sec70); /* Get time in seconds since 0:00am 1.1.1970 */

    pActTime = localtime( &Sec70); /* put it in a more reasonable format */

    sprintf( acTimeStamp,       /* arrange the interesting values in a string */
             "%.2d%.2d%.2d%.2d%.2d%.2d",
             pActTime->tm_year,
             pActTime->tm_mon +1,
             pActTime->tm_mday,
             pActTime->tm_hour,
             pActTime->tm_min,
             pActTime->tm_sec);

    strncpy( pcBuffer, acTimeStamp, MAX_TIMESTAMP +1);

 return(TRUE);
}

Feel free to ask if you need more information!
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Expert Comment

by:jkr
ID: 2261680
Oops, I almost forgot: You could of course also use '_strtime()'
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