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https://github.com/ashinn/chibi-scheme.git
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8b5eb68238
They can be close()d explicitly with close-file-descriptor, and will close() on gc, but only explicitly closing the last port on them will close the fileno. Notably needed for network sockets where we open separate input and output ports on the same socket.
64 lines
2.4 KiB
Scheme
64 lines
2.4 KiB
Scheme
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;; Imperative body:
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(define (loops n)
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(let ((result 0))
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(let loop1 ((i1 1))
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(if (> i1 n)
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'done
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(begin
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(let loop2 ((i2 1))
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(if (> i2 n)
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'done
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(begin
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(let loop3 ((i3 1))
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(if (> i3 n)
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'done
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(begin
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(let loop4 ((i4 1))
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(if (> i4 n)
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'done
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(begin
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(let loop5 ((i5 1))
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(if (> i5 n)
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'done
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(begin
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(let loop6 ((i6 1))
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(if (> i6 n)
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'done
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(begin
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(set! result (+ result 1))
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(loop6 (+ i6 1)))))
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(loop5 (+ i5 1)))))
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(loop4 (+ i4 1)))))
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(loop3 (+ i3 1)))))
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(loop2 (+ i2 1)))))
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(loop1 (+ i1 1)))))
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result))
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;; Functional body:
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(define (func-loops n)
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(let loop1 ((i1 1)(result 0))
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(if (> i1 n)
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result
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(let loop2 ((i2 1)(result result))
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(if (> i2 n)
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(loop1 (+ i1 1) result)
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(let loop3 ((i3 1)(result result))
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(if (> i3 n)
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(loop2 (+ i2 1) result)
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(let loop4 ((i4 1)(result result))
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(if (> i4 n)
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(loop3 (+ i3 1) result)
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(let loop5 ((i5 1)(result result))
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(if (> i5 n)
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(loop4 (+ i4 1) result)
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(let loop6 ((i6 1)(result result))
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(if (> i6 n)
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(loop5 (+ i5 1) result)
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(loop6 (+ i6 1) (+ result 1)))))))))))))))
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(let ((cnt (if (with-input-from-file "input.txt" read) 18 1)))
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(time (list
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(loops cnt)
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(func-loops cnt))))
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