ABSTRACT
So far we have discussed procedures whose dummy arguments are data objects of various kinds. However, it is also possible for a procedure to have, as an actual argument, the name of yet another procedure. This could be useful if, for example, a procedure is to be written to calculate the integral of an arbitrary function. We could have a subroutine with the structure
SUBROUTINE Integrate (Func, alimit, blimit, result) REAL, EXTERNAL :: Func
REAL, INTENT (IN) :: alimit, blimit REAL, INTENT (OUT) :: result REAL :: x! local variable
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