Family Day update

Task/Abstract-type/Go/abstract-type-2.go

@@ -0,0 +1,29 @@
+package main
+
+import "fmt"
+
+type Beast interface {
+	Cry() string
+}
+
+type Pet struct{}
+type Cat struct {
+	Pet
+}
+
+func (p Pet) Name(b Beast) {
+	fmt.Println(b.Cry())
+}
+func (p Pet) Cry() string {
+	return "Woof"
+}
+func (c Cat) Cry() string {
+	return "Meow"
+}
+
+func main() {
+	p := Pet{}
+	c := Cat{}
+	p.Name(p) // prt Woof
+	c.Name(c) // prt Meow
+}