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!-----  Ex9_4: 成績リスト   -----
   PROGRAM usage_of_pointer
      TYPE unit
         CHARACTER(LEN=12)   :: name
         INTEGER             :: mark
         TYPE(unit), POINTER :: next
      END TYPE
!
      CHARACTER(LEN=12)      :: namae
      INTEGER                :: tensu
      TYPE(unit), POINTER    :: ent, new, p
      ALLOCATE(ent);  NULLIFY(ent%next)
      DO
         PRINT*, "Input name (or [ENTER]-key to stop):"
         READ(*,'(A)') namae;  IF( namae ==' ') EXIT
         PRINT*, "Input her or his mark:"
         READ*, tensu
         CALL rearange
      END DO
!
!-----   出力
      p => ent%next
      DO WHILE( ASSOCIATED(p) )
         PRINT "(A12, I4)", p%name, p%mark
         p => p%next
      END DO
!
   CONTAINS
      SUBROUTINE rearange
         ALLOCATE(new)
         p => ent
         DO WHILE( ASSOCIATED(p%next))
            IF( tensu > p%next%mark ) EXIT
            p => p%next
         END DO
         new = unit(namae, tensu, p%next)
         p%next => new
      END SUBROUTINE
   END