demo_rnum0 Program

program demo_rnum0
use M_calculator, only : rnum0
implicit none
real :: x, y, z
   x=rnum0('20/3.4')
   y=rnum0('CI = 10 * sin(3.1416/4)')
   z=rnum0('CI')
   write(*,*)x,y,z
end program demo_rnum0