program program5
C
C  explicit data types
C
      implicit none  ! not required but a good idea

      integer n
      real x
      real m
      integer y

      print*,' enter 2 integers '
      read*,n,y
      print*,' sum is ', n+y
      print*,' enter 2 real numbers '
      read*,x,m
      print*,' difference is ',x-m
      end