19 lines
504 B
Text
19 lines
504 B
Text
import "/fmt" for Fmt
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var middle3 = Fn.new { |n|
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if (n < 0) n = -n
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var s = "%(n)"
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var c = s.count
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if (c < 3) return "Minimum is 3 digits, only has %(c)."
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if (c%2 == 0) return "Number of digits must be odd, %(c) is even."
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if (c == 3) return s
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var d = (c - 3)/2
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return s[d..d+2]
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}
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var a = [123, 12345, 1234567, 987654321, 10001, -10001, -123, -100, 100, -12345,
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1, 2, -1, -10, 2002, -2002, 0]
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for (e in a) {
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System.print("%(Fmt.s(9, e)) -> %(middle3.call(e))")
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}
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