by Keshav Mantha (1 Submission)
Category: Math/Dates
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Fri 24th August 2001
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
To calculate number of days elapsed between two dates. (Using Julian Date Method)
API Declarations
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VBcoders
*
pmmdd1 = substr(porgdt1,5,4)
pmmdd2 = substr(porgdt2,5,4)
*
n_mmdd1 = val(pmmdd1)
n_mmdd2 = val(pmmdd2)
*
pyy1 = substr(porgdt1,1,4)
pyy2 = substr(porgdt2,1,4)
*
n_yy1 = val(pyy1)
n_yy2 = val(pyy2)
*
pmm1 = substr(porgdt1,5,2)
pmm2 = substr(porgdt2,5,2)
*
n_mm1 = val(pmm1)
n_mm2 = val(pmm2)
*
sk_juldt()
*
retu
***
FUNCTION sk_juldt
*
sele b
use judb inde jmmdd
seek n_mmdd1
if found()
n_days1 = jday
endi
seek n_mmdd2
if found()
n_days2 = jday
endi
*
if n_yy2 > n_yy1
if (n_yy2 - n_yy1) > 1
days = days + 365*(n_yy2 - n_yy1 - 1)
if n_mm2 = n_mm1
if n_days2 > n_days1
days = days + (n_days2 - n_days1) + 365
endi
if n_days2 = n_days1
days = days + 365
endi
if n_days2 < n_days1
days = days + (365 - (n_days1 - n_days2))
endi
endi
if n_mm2 > n_mm1
days = days + (n_days2 - n_days1) + 365
endi
if n_mm2 < n_mm1
days = days + n_days2 + (365 - n_days1)
endi
endi
if (n_yy2 - n_yy1) = 1
if n_mm2 = n_mm1
if n_days2 > n_days1
days = days + (n_days2 - n_days1) + 365
endi
if n_days2 = n_days1
days = days + 365
endi
if n_days2 < n_days1
days = days + (365 - (n_days1 - n_days2))
endi
endi
if n_mm2 > n_mm1
days = days + (n_days2 - n_days1) + 365
endi
if n_mm2 < n_mm1
days = days + n_days2 + (365 - n_days1)
endi
endi
endi
if n_yy2 = n_yy1
if (n_mm2 > n_mm1) .or. (n_mm2 = n_mm1)
days = days + (n_days2 - n_days1)
endi
endi
retu days
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