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20 lines
459 B
20 lines
459 B
2 years ago
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Exercise 3.1: An
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accumulator is a
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procedure that is called repeatedly with a single numeric argument and
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accumulates its arguments into a sum. Each time it is called, it returns the
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currently accumulated sum. Write a procedure make-accumulator that
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generates accumulators, each maintaining an independent sum. The input to
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make-accumulator should specify the initial value of the sum; for
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example
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(define A (make-accumulator 5))
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(A 10)
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15
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(A 10)
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25
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