兼容类型 转换

var var1 int = 7
var2 := float32(var1)
var3 := int64(var1)

类型断言

var i interface{} = "tt"
j := i.(int)
转换不了 调用内置的panic

var i interface{} = "tt"
j, b := i.(int)
if b {
fmt.Println("success ")
} else{
fmt.Println("wrong")
}

var i interface{} = "tt"
j, b := i.(int)
if b {
fmt.Println("success ")
} else{
fmt.Println("wrong")
}


type Abc struct {
	A string
	B string
	C int
}

func main() {

	a := Abc{
		A: "a",
		B: "b",
		C: 2,
	}
	var i interface{} = a
	j := i.(Abc)
	fmt.Println(a)
	fmt.Println(j)

}