Created
June 10, 2020 02:25
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Solution of Exercise: Errors
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package main | |
import ( | |
"fmt" | |
) | |
type ErrNegativeSqrt float64 | |
func (e ErrNegativeSqrt) Error() string{ | |
return fmt.Sprintf("cannot Sqrt negative number: %v\n", float64(e)) | |
} | |
func Sqrt(x float64) (float64, error) { | |
if x < 0 { | |
return x, ErrNegativeSqrt(x) | |
} | |
return 0, nil | |
} | |
func main() { | |
fmt.Println(Sqrt(2)) | |
fmt.Println(Sqrt(-2)) | |
} |
Author
zh-f
commented
Jun 10, 2020
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