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25 lines
325 B
25 lines
325 B
package main
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import (
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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func main() {
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file, _ := os.ReadFile("rounds.txt")
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rounds, _ := strconv.Atoi(strings.TrimSpace(string(file)))
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x := 1.0
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pi := 1.0
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stop := float64(rounds + 2)
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for i := 2.0; i <= stop; i++ {
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x = -x
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pi += x / (2.0*i - 1.0)
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}
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pi *= 4.0
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fmt.Println(pi)
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} |