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27 lines
560 B
Nim
27 lines
560 B
Nim
discard """
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output: '''3.141792613595791
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3.141792613595791'''
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"""
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import strutils, math, threadpool
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proc term(k: float): float = 4 * math.pow(-1, k) / (2*k + 1)
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proc piU(n: int): float =
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var ch = newSeq[FlowVar[float]](n+1)
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for k in 0..ch.high:
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ch[k] = spawn term(float(k))
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for k in 0..ch.high:
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result += ^ch[k]
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proc piS(n: int): float =
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var ch = newSeq[float](n+1)
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parallel:
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for k in 0..ch.high:
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ch[k] = spawn term(float(k))
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for k in 0..ch.high:
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result += ch[k]
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echo formatFloat(piU(5000))
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echo formatFloat(piS(5000))
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