How to marshal array to binary and unmarshal binary to array in golang?

I want to use gob to encode and decode object, I do it like this:

type transProp struct {
    a []int
    b []float64
}

func (p transProp) MarshalBinary() ([]byte, error) {
    // A simple encoding: plain text.
    var b bytes.Buffer
    fmt.Fprintln(&b, p.a, p.b)
    return b.Bytes(), nil
}

// UnmarshalBinary modifies the receiver so it must take a pointer receiver.
func (p *transProp) UnmarshalBinary(data []byte) error {
    // A simple encoding: plain text.
    b := bytes.NewBuffer(data)
    _, err := fmt.Fscanln(b, &p.a, &p.b)
    return err
}

func TestGobEncode(t *testing.T) {
    p := transProp{
        a: []int{3, 4, 5},
        b: []float64{1.0, 2.0},
    }

    var network bytes.Buffer
    enc := gob.NewEncoder(&network)
    err := enc.Encode(p)
    if err != nil {
        log.Fatal("encode:", err)
    }
    dec := gob.NewDecoder(&network)
    var p1 transProp
    err = dec.Decode(&p1)
    if err != nil {
        log.Fatal("decode:", err)
    }
    fmt.Println(p1)
}

But, this report error like this:

decode:can't scan type: *[]int