Creation of accumulators
An accumulator is a procedure that is called repeatedly with a single numeric argument and accumulates its arguments into a sum. Each time it is called, it returns the currently accumulated sum. Write a procedure
make-accumulator
that generates accumulators, each maintaining an independent sum. The input to
make-accumulator
should specify the initial value of the sum, for example:
(define A (make-accumulator 5))
(A 10)
15
(A 10)
25