demo_system_getcwd Program

       program demo_system_getcwd
       use M_system, only : system_getcwd
       implicit none
       character(len=:),allocatable :: dirname
       integer                      :: ierr
       call system_getcwd(dirname,ierr)
       if(ierr.eq.0)then
          write(*,*)'CURRENT DIRECTORY ',trim(dirname)
       else
          write(*,*)'ERROR OBTAINING CURRENT DIRECTORY NAME'
       endif
       end program demo_system_getcwd