Article ID: 130769
Article Last Modified on 7/5/2005
APPLIES TO
- Microsoft Visual C++ 2.0 Professional Edition
- Microsoft Visual C++ 2.1
This article was previously published under Q130769
SYMPTOMS
The wrong date is returned when a negative value is passed for the month to the mktime() function.
For example, in the sample code in this article, -1 is passed for the month, so the mktime() function should return December 15, 1994. However, it incorrectly returns January 16, 1995.
RESOLUTION
Verify that the value for the month is greater than or equal to zero, when calling the mktime() function.
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug was corrected in Microsoft Visual C++, 32-bit Edition, version 4.0.
MORE INFORMATION
Sample Code to Reproduce Problem
/* Compile options needed: none
*/
#include <time.h>
#include <stdio.h>
void main() {
time_t CurrentTime, NewTime;
struct tm TimeStruct;
time ( &CurrentTime );
TimeStruct = *localtime(&CurrentTime);
TimeStruct.tm_mday = 15;
TimeStruct.tm_mon = -1;
TimeStruct.tm_year = 95;
NewTime = mktime (&TimeStruct);
printf("%s", asctime( &TimeStruct));
}
Additional query words: 9.00 9.10
Keywords: kbbug kbfix kblist kbcompiler KB130769
