type person struct {
    name string
    age  int
}

//初始化

func main() {
    var P person

    P.name = "tom"
    P.age = 25
    fmt.Println(P.name)

    P1 := person{"Tom1", 25}
    fmt.Println(P1.name)

    P2 := person{age: 24, name: "Tom"}
    fmt.Println(P2.name)
}

type Human struct {
    name string
    age int
    weight int
}

tyep Student struct {
    Human //匿名字段，默認Student包含了Human的所有字段
    speciality string
}

mark := Student(Human{"mark", 25, 120}, "Computer Science")

mark.name
mark.age

mark.Human = Human{"a", 55, 220}
mark.Human.age -= 1

type Rect struct {
    x, y float64
    width, height float64
}

//method

func (r ReciverType) funcName(params) (results) {

}

func (r *Rect) Area() float64 {
    return r.width * r.height
}

func (b *Box) SetColor(c Color) {
    b.color = c
}

type Human struct {
    name string
}

type Student struct {
    Human
    School string
}

func (h *Human) SayHi() {
    fmt.Println(h.name)
}

//則Student和Employee的實例可以調用
func main() {
    h := Human{name: "human"}
    fmt.Print(h.name)
    h.SayHi()

    s := Student{Human{"student"}}
    s.SayHi()

}

funct (e *Student) SayHi() {
    e.Human.SayHi()
    fmt.Println(e.School)
}