отредактирована 3 глава

part_3/3.6/golang/factory/main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"golang/factory/shape"
+)
+
+func main() {
+	rectangle := shape.NewRectangle(10, 6, shape.Point{X: 6, Y: -8}, "Gold")
+
+	fmt.Printf("%+v\n", *rectangle)
+	fmt.Printf("%+v\n", rectangle.GetName())
+	fmt.Printf("Perimeter = %+v\n", rectangle.GetPerimeter())
+	fmt.Printf("Area = %+v\n", rectangle.GetArea())
+
+	// меняем значения полей
+	rectangle.SetLength(15)
+	rectangle.SetWidth(7)
+	rectangle.SetColor("Green")
+
+	fmt.Printf("%+v\n", *rectangle)
+	fmt.Printf("New perimeter = %+v\n", rectangle.GetPerimeter())
+	fmt.Printf("New Area = %+v\n", rectangle.GetArea())
+}