28 lines
705 B
Scheme
28 lines
705 B
Scheme
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(use fmt test)
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;;(use numbers) ; test with and without numbers via -R numbers
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(define (check-representation n)
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(define pence
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(inexact->exact (round (/ (modulo n 1000) 10))))
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(define pounds (quotient n 1000))
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(if (> pence 99)
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(begin
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(set! pence (- 100 pence))
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(set! pounds (add1 pounds))))
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(define expected-result
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(cond
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((= pence 0) (sprintf "~S.00" pounds))
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((< pence 10) (sprintf "~S.0~S" pounds pence))
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(else (sprintf "~S.~S" pounds pence))))
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(test (sprintf "~S = ~S?" (exact->inexact (/ n 1000)) expected-result)
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expected-result
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(fmt #f (num (/ n 1000) 10 2))))
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(test-begin)
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(for-each check-representation (iota 10000))
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(test-end)
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