41 lines
431 B
Go
41 lines
431 B
Go
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package main
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import (
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"fmt"
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"math"
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)
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type MyFloat float64
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type Vertex struct {
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X, Y float64
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}
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type Abser interface {
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Abs() float64
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}
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func (f MyFloat) Abs() float64 {
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if f < 0 {
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return float64(-f)
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}
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return float64(f)
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}
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func (v *Vertex) Abs() float64 {
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return math.Sqrt(v.X*v.X + v.Y*v.Y)
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}
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func main() {
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var a Abser
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f := MyFloat(-math.Sqrt2)
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v := Vertex{3, 4}
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a = f
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a = &v
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// a = v
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fmt.Println(a.Abs())
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}
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