58 lines
1.8 KiB
Plaintext
58 lines
1.8 KiB
Plaintext
class Num2 {
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static ipow(i, exp) {
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if (!i.isInteger) Fiber.abort("ipow method must have an integer receiver")
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if (!exp.isInteger) Fiber.abort("ipow method must have an integer exponent")
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if (i == 1 || exp == 0) return 1
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if (i == -1) return (exp%2 == 0) ? 1 : -1
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if (exp < 0) Fiber.abort("ipow method cannot have a negative exponent")
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var ans = 1
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var base = i
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var e = exp
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while (e > 1) {
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if (e%2 == 1) ans = ans * base
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e = (e/2).floor
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base = base * base
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}
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return ans * base
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}
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static fpow(f, exp) {
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if (!exp.isInteger) Fiber.abort("fpow method must have an integer exponent")
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var ans = 1.0
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var e = exp
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var base = (e < 0) ? 1/f : f
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if (e < 0) e = -e
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while (e > 0) {
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if (e%2 == 1) ans = ans * base
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e = (e/2).floor
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base = base * base
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}
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return ans
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}
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construct new(n) { _n = n }
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^(exp) {
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if (_n.isInteger && (exp >= 0 || _n.abs == 1)) return Num2.ipow(_n, exp)
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return Num2.fpow(_n, exp)
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}
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}
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System.print("Using static methods:")
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System.print(" 2 ^ 3 = %(Num2.ipow(2, 3))")
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System.print(" 1 ^ -10 = %(Num2.ipow(1, -10))")
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System.print(" -1 ^ -3 = %(Num2.ipow(-1, -3))")
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System.print()
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System.print(" 2.0 ^ -3 = %(Num2.fpow(2.0, -3))")
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System.print(" 1.5 ^ 0 = %(Num2.fpow(1.5, 0))")
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System.print(" 4.5 ^ 2 = %(Num2.fpow(4.5, 2))")
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System.print("\nUsing the ^ operator:")
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System.print(" 2 ^ 3 = %(Num2.new(2) ^ 3)")
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System.print(" 1 ^ -10 = %(Num2.new(1) ^ -10)")
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System.print(" -1 ^ -3 = %(Num2.new(-1) ^ -3)")
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System.print()
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System.print(" 2.0 ^ -3 = %(Num2.new(2.0) ^ -3)")
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System.print(" 1.5 ^ 0 = %(Num2.new(1.5) ^ 0)")
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System.print(" 4.5 ^ 2 = %(Num2.new(4.5) ^ 2)")
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