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  1. package main
  2.  
  3. import (
  4. 	"fmt"
  5. 	"math"
  6. )
  7.  
  8. func main() {
  9. 	fmt.Println(pi(5000))
  10. }
  11.  
  12. func pi(n int) float64 {
  13. 	ch := make(chan float64)
  14. 	for k := 0; k <= n; k++ {
  15. 		go term(ch, float64(k))
  16. 	}
  17. 	f := 0.0
  18. 	for k := 0; k <= n; k++ {
  19. 		f += <-ch
  20. 	}
  21. 	return f
  22. }
  23.  
  24. func term(ch chan float64, k float64) {
  25. 	ch <- 4 * math.Pow(-1, k) / (2*k + 1)
  26. }
  27.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.go:19: invalid operation: f += <-ch (type float + float64)
prog.go:21: cannot use f (type float) as type float64 in return argument
stdout
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Standard output is empty
https://ideone.com/fp3nL
language:
Go (go 1.12.1)
created:
14 years ago
visibility:
public

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