Go 每日一题

今日（2023-03-15）的题目如下

下面代码输出什么？

type A interface {
	ShowA() int
}

type B interface {
	ShowB() int
}

type Work struct {
	i int
}

func (w Work) ShowA() int {
	return w.i + 10
}

func (w Work) ShowB() int {
	return w.i + 20
}

func main() {
	c := Work{3}
	var a A = c
	var b B = c
	fmt.Println(a.ShowB())
	fmt.Println(b.ShowA())
}

• A. 23 13
• B. compilation error

a.ShowB undefined (type A has no field or method ShowB)
b.ShowA undefined (type B has no field or method ShowA)