如何从for循环中使用接口

type Animal interface {
    Sound() string
}

type Dog struct{}
type Cat struct{}

func (d Dog) Sound() string {
    return "Woof"
}

func (c Cat) Sound() string {
    return "Meow"
}

func main() {
    animals := []Animal{Dog{}, Cat{}}
    for _, animal := range animals {
        fmt.Println(animal.Sound())
    }
}

type Writer interface {
    Write(data string)
}

type IntSlice []int

func (s IntSlice) Write(data string) {
    for _, num := range s {
        fmt.Println(data, num)
    }
}

type StringSlice []string

func (s StringSlice) Write(data string) {
    for _, str := range s {
        fmt.Println(data, str)
    }
}

func main() {
    writers := []Writer{IntSlice{1, 2, 3}, StringSlice{"hello", "world"}}
    for _, writer := range writers {
        writer.Write("Data:")
    }
}

type Reader interface {
    Read() string
}

type IntSlice []int

func (s IntSlice) Read() string {
    result := ""
    for _, num := range s {
        result += fmt.Sprintf("%d ", num)
    }
    return result
}

type StringSlice []string

func (s StringSlice) Read() string {
    result := ""
    for _, str := range s {
        result += fmt.Sprintf("%s ", str)
    }
    return result
}

func main() {
    data := []Reader{IntSlice{1, 2, 3}, StringSlice{"hello", "world"}}
    for _, reader := range data {
        fmt.Println(reader.Read())
    }
}