cashier.go

gistfile1.txt

```go
package main

import (
	"fmt"
)

type Item struct {
	Name     string
	Price    float64
	discount float64
}

type Describable interface {
	Desription() string
}

func (i Item) Desription() {
	if i.discount > 0 {
		fmt.Printf("Name: %s, Price: %.2f, Discounted Price: %.2f\n", i.Name, i.Price, calculatePrice(i))
	} else {
		fmt.Printf("Name: %s, Price: %.2f\n", i.Name, i.Price)
	}
}

func calculatePrice(item Item) float64 {
	if item.discount > 0 {
		return item.Price - item.discount
	}
	return item.Price

}

func totalPrice(items []Item) float64 {
	var total float64
	for _, item := range items {
		price := calculatePrice(item)
		total += price
	}
	return total
}

func main() {
	var items [4]Item
	items[0] = Item{
		Name:     "Laptop",
		Price:    50000,
		discount: 5000,
	}
	items[1] = Item{
		Name:     "Phone",
		Price:    40000,
		discount: 3200,
	}
	items[2] = Item{
		Name:     "Playstation",
		Price:    20000,
		discount: 1200,
	}
	items[3] = Item{
		Name:     "Vergisiz Phone",
		Price:    2000,
		discount: 0,
	}
	for _, item := range items {
		item.Desription()
	}
	fmt.Printf("\a")
}
```