I have a routine to get 4 command line argument:
module chk_argumnt
CONTAINS
subroutine chk(x,y)
implicit none
integer::ac
real*4::x,y!,v_a,v_b,e_a,e_b
character(4)::cx,cy,atn1,atn2
! ac=command_argument_count()
write(*,*)command_argument_count()
call get_command_argument(1,cx)
call get_command_argument(2,cy)
call get_command_argument(3,atn1)
call get_command_argument(4,atn2)
read(cy,*)y
read(cx,*)x
write(*,*)atn1,cx,atn2,cy
write(*,*)"from module",x,y
end subroutine chk
end module chk_argumnt

now i want to use them in another routine to initialize variable/
parameters:

program main
use chk_argumnt

real*4::tx=x*10,ty=y*10
! real*4,parameter::tx=x*10,ty=y*10
call chk(x,y)
write(*,*) x
write(*,*) y

end program main

but i cannot do that. What my aim is to supply the main four
parameters from commandline. how can i do that?