Исправления: добавил применение скидок через интерфейс и переделал фу…

…нкции

golang/lab7/Book.go

@@ -1,29 +1,29 @@
 package lab7
 
-import "fmt"
+import (
+	"fmt"
+)
 
 type Book struct {
 	Name   string
 	Author string
 	Price  float64
 }
 
-func (e *Book) SetName(name string) {
-	e.Name = name
-}
-
-func (b *Book) GetName() string {
-	return b.Name
-}
-
-func (b *Book) GetPrice() float64 {
-	return b.Price
-}
-
-func (b *Book) SetPrice(price float64) {
+func NewBook(name string, author string, price float64) *Book {
+	b := new(Book)
+	b.Name = name
+	b.Author = author
 	b.Price = price
+	return b
 }
 
+func (b *Book) SetPrice(price float64)  { b.Price = price }
+func (b Book) GetPrice() float64        { return b.Price }
+func (b *Book) SetName(name string)     { b.Name = name }
+func (b Book) GetName() string          { return b.Name }
+func (b *Book) SetAuthor(author string) { b.Author = author }
+
 func (b *Book) ApplyDiscount(discount float64) {
 	if discount > 0 && discount <= 100 {
 		b.SetPrice(b.GetPrice() * (1 - discount/100))

golang/lab7/Electronics.go

@@ -8,22 +8,20 @@ type Electronics struct {
 	Price float64
 }
 
-func (e *Electronics) SetModel(model string) {
+func NewElectronics(name string, model string, price float64) *Electronics {
+	e := new(Electronics)
+	e.Name = name
 	e.Model = model
-}
-
-func (e *Electronics) GetName() string {
-	return e.Name
-}
-
-func (e *Electronics) GetPrice() float64 {
-	return e.Price
-}
-
-func (e *Electronics) SetPrice(price float64) {
 	e.Price = price
+	return e
 }
 
+func (e *Electronics) SetPrice(price float64) { e.Price = price }
+func (e Electronics) GetPrice() float64       { return e.Price }
+func (e *Electronics) SetName(name string)    { e.Name = name }
+func (e Electronics) GetName() string         { return e.Name }
+func (e *Electronics) SetModel(model string)  { e.Model = model }
+
 func (e *Electronics) ApplyDiscount(discount float64) {
 	if discount > 0 && discount <= 100 {
 		e.SetPrice(e.GetPrice() * (1 - discount/100))