Returns the current hour from a serial Julian date and time. Excel: HOUR

Contents

Interface Function Documentation Page Comments

Interface

#include <codecogs/units/time/hour.h>

using namespace Units::Time;

	int	hour (double time)[inline] Returns the current hour from a serial Julian date and time. Excel: HOUR
	Integer	cc_hour (Real time) This function is available as a Microsoft Excel add-in.

Function Documentation

Returns the hour within a serial Julian date and time values. Care must be taken in handling rounding errors appropriately, because time is expressed as a fraction of a 24hr day. Therefore 1hr is ~0.041666 days. Given this fraction, this function first calculates the number of seconds that have lapsed into the current day, rounding to the nearest second. The seconds are then converting in a whole number of hours.

Example 1:

#include <stdio.h>
#include <codecogs/units/time/now.h>
#include <codecogs/units/time/hour.h> 
using namespace Units::Time;
 
int main()
{
  printf("\n The current hour using USA daylight saving is", hour(now(st_USA)));
  printf("\n The current hour using European daylight saving is", hour(now(st_EU)));
  return 0;
}

Parameters:

time	is the serial Julian date and time value.

Authors:

Will Bateman (Sep 2004)