problems about date_and_time 2

[NTC0394]

I am trying use date_and_time to calculate how old someone are but I am having some problems about how
change characters to integers. Please, help me!!
Thank you in advance

PROGRAM how_old
IMPLICIT none
INTEGER, PARAMETER :: m_year = 12
INTEGER :: m_born, year_born , day_born, how_old
INTEGER :: current year, current_month, current_day
***********my problem************************
CHARACTER(8) :: dat
! call current date
CALL date_and_time( DATE=dat )
*********************************************
PRINT *, "Write the day you was born and press ENTER:"
READ *, day_born
PRINT *, "Write the month you was born and press ENTER:"
READ *, m_born
PRINT *, "Write the year you was born and press ENTER:"
READ *, year_born
how_old = ((current_year - year_born)*m_year + current_month - m_born)/m_year
PRINT *, "You are ", how_old," years"
END PROGRAM how_old

 

[FJacq]

You just have to read from rhe character string "dat" :

PROGRAM main
IMPLICIT none
INTEGER, PARAMETER :: m_year = 12
INTEGER :: m_born, year_born , day_born, how_old 
INTEGER :: current_year, current_month, current_day
!***********my problem************************
CHARACTER(8) :: dat
! call current date
CALL date_and_time( DATE=dat ) 
read(dat,'(i4,i2,i2)') current_year,current_month,current_day
!*********************************************
PRINT *, "Write the day you was born and press ENTER:"
READ *, day_born
PRINT *, "Write the month you was born and press ENTER:"
READ *, m_born
PRINT *, "Write the year you was born and press ENTER:"
READ *, year_born
how_old = ((current_year - year_born)*m_year + current_month - m_born)/m_year 
PRINT *, "You are ", how_old," years"
END PROGRAM main
[/code}

François Jacq

 

[j0zn]

Great FJacq!
How to do this without using character?
I mean without using the folliwng:

CHARACTER(8) :: dat
read(dat,'(i4,i2,i2)') current_year,current_month,current_day

 

[j0zn]

Is possible do this using the same program struture?

 

[xwb]

You can always use the values parameter (see

http://docs.oracle.com/cd/E19957-01/805-4942/6j4m3r8t2/index.html).

integer timestamp(8)
call date_and_time(values=timestamp)
current_year = timestamp(1)
current_month = timestamp(2)
current_day = timestamp(3)

You might find Zeller's congruence interesting.