如何在时间time上减几小时
我想在时间time上减几小时,该怎么写啊?
time t
t = relativeTime( 19:39:50, 10 ) //t = 19:40:00
RelativeTime PowerScript function
Description
Obtains a time that occurs a specified number of seconds after or before another time within a 24-hour period.
Syntax
RelativeTime ( time, n )
Argument Description
time A value of type time
n A long number of seconds
Return value
Time. Returns the time that occurs n seconds after time if n is greater than 0. Returns the time that occurs n seconds before time if n is less than 0. The maximum return value is 23:59:59. If any argument's value is NULL, RelativeTime returns NULL.
This statement returns 19:01:41:
RelativeTime(19:01:31, 10)
This statement returns 19:01:21:
RelativeTime(19:01:31, - 10)