diff --git a/golang/lab4/Calculate.go b/golang/lab4/Calculate.go
index 97b0ebf1..76157df0 100644
--- a/golang/lab4/Calculate.go
+++ b/golang/lab4/Calculate.go
@@ -1,8 +1,11 @@
-package Lab4
+package lab4
 
 import (
-	"math"
 	"fmt"
+	"math"
+	"strconv"
+
+	"isuct.ru/informatics2022/lab8"
 )
 
 func Calculate(a,b,x float64) float64 {
@@ -18,19 +21,41 @@ func TaskA(a, b, x1, x2, dx float64) []float64 {
 	return y
 }
 
-func TaskB(a float64, b float64, x[5] float64) []float64 {
-	var y []float64
+func TaskB(a float64, b float64, x[] float64) []float64 {
+	var arr []float64
 	for _, value := range x {
-		y = append(y, Calculate(a,b,value))
+		arr = append(arr, Calculate(a,b, value))
 	}
-	return y
+	return arr
+}
+
+func PrintValue(Values []float64) {
+	for _, value := range Values {
+		fmt.Println(value)
+	}
+}
+
+func ReadFileTask4() []float64 {
+	fmt.Println("Введите X1, X2, dX для задачи A и список значений для задачи B")
+	arr := lab8.RunLab8()
+	var numbers []float64
+	for _, values := range arr {
+		value, _ := strconv.ParseFloat(values, 64)
+		numbers = append(numbers, value)
+	}
+	return numbers
 }
 
+
 func RunLab4 () {
-	a := 1.1
-	b := 0.09
-	
-	fmt.Println(TaskA(a,b,1.2,2.2,0.2))
-	var s = [5]float64{1.21,1.76,2.53,3.48,4.52}
-	fmt.Println(TaskB(a, b, s))
+	const a = 1.1
+	const b = 0.09
+	arr := ReadFileTask4()
+	slice := arr[3:]
+
+	ValuesA := TaskA(a, b, arr[0], arr[1], arr[2])
+	ValuesB := TaskB(a, b, slice)
+
+	PrintValue(ValuesA)
+	PrintValue(ValuesB)
 }
diff --git a/golang/lab7/Clothes.go b/golang/lab7/Clothes.go
new file mode 100644
index 00000000..d2c8acaa
--- /dev/null
+++ b/golang/lab7/Clothes.go
@@ -0,0 +1,30 @@
+package lab7
+
+import "fmt"
+
+type Dress struct {
+	Description string
+	Fabric string
+	Brand string
+	Price float64
+}
+
+func (f Dress) GetDescription() {
+	fmt.Println("Это", f.Description, "из", f.Fabric, "от бренда", f.Brand ,"стоимостью", f.Price)
+}
+
+func (f Dress) GetPrice() float64 {
+	return f.Price
+}
+
+func (f *Dress) ApplyDiscount(x float64) {
+	(*f).Price = (f.Price) * (x)
+}
+
+func (f *Dress) UpdatePrice(x float64) {
+	(*f).Price = x
+}
+
+func (f *Dress) UpdateDescription(x string) {
+	(*f).Fabric = x
+}
diff --git a/golang/lab7/HouseholdGoods.go b/golang/lab7/HouseholdGoods.go
new file mode 100644
index 00000000..79c8e897
--- /dev/null
+++ b/golang/lab7/HouseholdGoods.go
@@ -0,0 +1,28 @@
+package lab7
+
+import "fmt"
+
+type Microwave_oven struct {
+	Name      string
+	Price     float64
+}
+
+func (f Microwave_oven) GetDescription() {
+	fmt.Println("Микроволновая печь", f.Name, "стоимостью", f.Price)
+}
+
+func (f Microwave_oven) GetPrice() float64 {
+	return f.Price
+}
+
+func (f *Microwave_oven) ApplyDiscount(x float64) {
+	(*f).Price = (f.Price) * (x)
+}
+
+func (f *Microwave_oven) UpdatePrice(x float64) {
+	(*f).Price = x
+}
+
+func (f *Microwave_oven) UpdateDescription(x string) {
+	(*f).Name = x
+}
diff --git a/golang/lab7/PetFood.go b/golang/lab7/PetFood.go
new file mode 100644
index 00000000..b371e3fb
--- /dev/null
+++ b/golang/lab7/PetFood.go
@@ -0,0 +1,29 @@
+package lab7
+
+import "fmt"
+
+type CatFood struct {
+	Name      string
+	Brand     string
+	Price     float64
+}
+
+func (f CatFood) GetDescription() {
+	fmt.Println("Корм для кошек", f.Name, "от бренда", f.Brand, "он стоит", f.Price)
+}
+
+func (f CatFood) GetPrice() float64 {
+	return f.Price
+}
+
+func (f *CatFood) ApplyDiscount(x float64) {
+	(*f).Price = (f.Price) * (x)
+}
+
+func (f *CatFood) UpdatePrice(x float64) {
+	(*f).Price = x
+}
+
+func (f *CatFood) UpdateDescription(x string) {
+	(*f).Name = x
+}
diff --git a/golang/lab7/lab7.go b/golang/lab7/lab7.go
new file mode 100644
index 00000000..18441cc0
--- /dev/null
+++ b/golang/lab7/lab7.go
@@ -0,0 +1,46 @@
+package lab7
+
+import "fmt"
+
+type Product interface {
+	GetDescription()
+	GetPrice() float64
+	ApplyDiscount(discount float64)
+	UpdatePrice(newPrice float64)
+	UpdateDescription(newDescription string)
+}
+
+func CalculatePrice(list []Product) float64 {
+	var sum float64 = 0
+	for _, price := range list {
+		sum += price.GetPrice()
+	}
+	return sum
+}
+
+func RunLab7() {
+	var CatFood Product = &CatFood{"Orijen Cat&Kitten Grin Free", "Orijen", 9900}
+	var Microwave_oven Product = &Microwave_oven{"Hotpoint MWHA 201", 10490}
+	var Dress Product = &Dress{"гипюровое платье", "полиэстера", "DStrend", 5983}
+
+	CatFood.GetDescription()
+	Microwave_oven.GetDescription()
+	Dress.GetDescription()
+
+	var purchase []Product = []Product{CatFood, Microwave_oven, Dress}
+	totalCost := CalculatePrice(purchase)
+	fmt.Println("Общая стоимость списка товаров:", totalCost)
+
+	CatFood.UpdatePrice(9400)
+	Microwave_oven.UpdateDescription("Samsung")
+	Microwave_oven.ApplyDiscount(0.1)
+	Dress.ApplyDiscount(0.2)
+	Dress.UpdateDescription("хлопка")
+
+	CatFood.GetDescription()
+	Microwave_oven.GetDescription()
+	Dress.GetDescription()
+
+	totalCost = CalculatePrice(purchase)
+	fmt.Println("Общая стоимость списка товаров с учетом всех скидок:", totalCost)
+}
diff --git a/golang/lab8/lab8_1.go b/golang/lab8/lab8_1.go
new file mode 100644
index 00000000..ee60030a
--- /dev/null
+++ b/golang/lab8/lab8_1.go
@@ -0,0 +1,52 @@
+package lab8
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+)
+
+type Params struct {
+	A     float64
+	B     float64
+	x1    float64
+	x2    float64
+	dx    float64
+	slice []float64
+}
+
+func LoadParameters(filename string) (Params, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return Params{}, fmt.Errorf("Не удалось открыть файл: %w", err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	var values []float64
+	for scanner.Scan() {
+		line := scanner.Text()
+		num, err := strconv.ParseFloat(line, 64)
+		if err != nil {
+			return Params{}, fmt.Errorf("Ошибка преобразования строки '%s' в float: %w", line, err)
+		}
+		values = append(values, num)
+	}
+
+	if err := scanner.Err(); err != nil {
+		return Params{}, fmt.Errorf("ошибка при чтении файла: %w", err)
+	}
+	if len(values) < 6 {
+		return Params{}, fmt.Errorf("Недостаточно значений. Введите еще раз")
+	}
+	parameters := Params{
+		A:     values[0],
+		B:     values[1],
+		x1:    values[2],
+		x2:    values[3],
+		dx:    values[4],
+		slice: values[5:],
+	}
+	return parameters, nil
+}
diff --git a/golang/lab8/lab8_2.go b/golang/lab8/lab8_2.go
new file mode 100644
index 00000000..2621484c
--- /dev/null
+++ b/golang/lab8/lab8_2.go
@@ -0,0 +1,78 @@
+package lab8
+
+import (
+	"fmt"
+	"os"
+	"io"
+	"strings"
+)
+
+func CreateFile(name string) {
+	file, err := os.Create(name)
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+}
+
+
+func ReadFile(name string) []string {
+	var arr []string
+	file, err := os.Open(name)
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+	for {
+		data := make([]byte, 64)
+		for {
+			n, err := file.Read(data)
+			if err == io.EOF {
+				break
+			}
+			arr = append(arr, string(data[:n]))
+			break
+		}
+		return arr
+	}
+}
+
+func WriteInFile(name string, count int) {
+	var value string
+	file, err := os.OpenFile(name, os.O_RDWR, 0666)
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+	for i := 1; i <= count; i++ {
+		fmt.Print("Введите данные: ")
+		fmt.Fscan(os.Stdin, &value)
+		file.WriteString(value + "\n")
+	}
+}
+
+func SearchInFile(data string, search string) bool {
+	return strings.Contains(data, search)
+}
+
+func RunLab8() []string {
+	var NameFile string
+	fmt.Print("Введите название файла: ")
+	fmt.Fscan(os.Stdin, &NameFile)
+	CreateFile(NameFile)
+
+	var Count int
+	fmt.Print("Cколько значений вы хотите занести в файл: ")
+	fmt.Fscan(os.Stdin, &Count)
+	WriteInFile(NameFile, Count)
+
+	arr := strings.Split(ReadFile(NameFile)[0], "\n")
+	arr = arr[0 : len(arr)-1]
+
+	var Search string
+	fmt.Print("Какое значение вы хотите найти в файле: ")
+	fmt.Fscan(os.Stdin, &Search)
+	SearchInFile(NameFile, Search)
+
+	return arr
+}
diff --git a/golang/main.go b/golang/main.go
index 74f53540..b034dc82 100644
--- a/golang/main.go
+++ b/golang/main.go
@@ -1,14 +1,16 @@
 package main
 
 import (
-	"isuct.ru/informatics2022/lab4"
 	"isuct.ru/informatics2022/lab6"
+	"isuct.ru/informatics2022/lab7"
+	"isuct.ru/informatics2022/lab8"
 	"fmt"
 )
 
 func main() {
-	Lab4.RunLab4()
 	lab6.RunLab6()
+	lab7.RunLab7()
+	lab8.RunLab8()
 
 	fmt.Println("Istomina_Elena_Sergeevna")
 }