отредактирована 3 глава

part_3/3.6/golang/factory/go.mod

@@ -0,0 +1,3 @@
+module golang/factory
+
+go 1.24

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())
+}

part_3/3.6/golang/factory/shape/rectangle.go

@@ -0,0 +1,47 @@
+package shape
+
+type Rectangle struct {
+	shape  // композиция
+	width  uint
+	length uint
+}
+
+func (r *Rectangle) GetWidth() uint {
+	return r.width
+}
+
+func (r *Rectangle) GetLength() uint {
+	return r.length
+}
+
+func (r *Rectangle) SetWidth(width uint) {
+	r.width = width
+}
+
+func (r *Rectangle) SetLength(length uint) {
+	r.length = length
+}
+
+func (r *Rectangle) GetPerimeter() uint {
+	return (r.length + r.width) * 2
+}
+
+func (r *Rectangle) GetArea() uint {
+	return r.length * r.width
+}
+
+func (r *Rectangle) GetName() string {
+	return "Super-puper " + r.shape.GetName()
+}
+
+func NewRectangle(width, length uint, center Point, color string) *Rectangle {
+	return &Rectangle{
+		shape: shape{
+			name:   "Rectangle",
+			color:  color,
+			center: center,
+		},
+		width:  width,
+		length: length,
+	}
+}

part_3/3.6/golang/factory/shape/shape.go

@@ -0,0 +1,32 @@
+package shape
+
+type Point struct {
+	X int
+	Y int
+}
+
+type shape struct {
+	name   string
+	center Point
+	color  string
+}
+
+func (s *shape) SetColor(color string) {
+	s.color = color
+}
+
+func (s *shape) GetColor() string {
+	return s.color
+}
+
+func (s *shape) GetName() string {
+	return s.name
+}
+
+func (s *shape) MoveCenter(point Point) {
+	s.center = point
+}
+
+func (s *shape) GetCenter() Point {
+	return s.center
+}