mktime()执行出错！

[babam]

time_t seconds;
struct tm time_fields1;
time_fields1.tm_mday = 11;
time_fields1.tm_mon = 11;
time_fields1.tm_year = 2000;
time_fields1.tm_hour = 0;
time_fields1.tm_min = 0;
time_fields1.tm_sec = 0;


seconds = mktime(&time_fields1);
cout << seconds << endl;//seconds 总是得到－1
//用法不对吗？

[txdyjsyz]

mktime returns the specified calendar time encoded as a value of type time_t. If timeptr references a date before midnight, January 1, 1970, or if the calendar time cannot be represented, mktime returns –1 cast to type time_t. When using mktime and if timeptr references a date after 3:14:07 January 19, 2038, UTC, it will return –1 cast to type time_t.

_mktime64 will return –1 cast to type __time64_t if timeptr references a date after 23:59:59, December 31, 3000, UTC.

[柯本]

///year要-1900
#include <time.h>
#include <iostream>
using namespace std;
main()
{
time_t seconds;
struct tm time_fields1;
time_fields1.tm_mday = 11;
time_fields1.tm_mon = 11;
time_fields1.tm_year = 2000-1900;
time_fields1.tm_hour = 0;
time_fields1.tm_min = 0;
time_fields1.tm_sec = 0;
seconds = mktime(&time_fields1);
cout << seconds << endl;//seconds
}