Исходники и презентации

lessons/interfaces/polymorphism/main.go

@@ -0,0 +1,31 @@
+package main
+
+import "fmt"
+
+type Figure interface {
+	Area() int
+}
+
+type Square struct {
+	x int
+}
+
+func (s Square) Area() int {
+	return s.x * s.x
+}
+
+type Rectangle struct {
+	x int
+	y int
+}
+
+func (r Rectangle) Area() int {
+	return r.x * r.y
+}
+
+func main() {
+	figures := []Figure{Square{10}, Rectangle{10, 20}}
+	for _, figure := range figures {
+		fmt.Println(figure.Area())
+	}
+}