discount.go

package main

import (
	"fmt"
)

// pricePerWeight for the carrot
const pricePerWeight = 3

// pricePerUnit for cucumber
const pricePerUnit = 1

const Discount = 10

type Carrot struct {
	//Weight in kg
	Weight        float64
	Price         float64
	DiscountPrice float64
}

type Cucumber struct {
	//quantity of cucumber
	Unit          float64
	Price         float64
	DiscountPrice float64
}

type Basket []struct {
	Carrot               Carrot
	Cucumber             Cucumber
	TotalDiscountedPrice float64
}

func main() {
	var basket = Basket{
		{Carrot: Carrot{Weight: 2}, Cucumber: Cucumber{Unit: 5}},
		{Carrot: Carrot{Weight: 3}, Cucumber: Cucumber{Unit: 6}},
	}
	for _, r := range basket {
		switch {
		case r.Carrot.Weight == 2:

			r.Carrot.Price = (r.Carrot.Weight - 1) * pricePerWeight
			r.Cucumber.Price = (r.Cucumber.Unit - 2) * pricePerUnit
			// To calculate the discount price
			r.Carrot.DiscountPrice = ((r.Carrot.Weight - 1) * pricePerWeight) + r.Carrot.Price - (r.Carrot.Price * Discount / 100)
			r.Cucumber.DiscountPrice = ((r.Cucumber.Unit - 3) * pricePerUnit) + r.Cucumber.Price - (r.Cucumber.Price * Discount / 100)
			r.TotalDiscountedPrice = r.Carrot.DiscountPrice + r.Cucumber.DiscountPrice
			fmt.Printf("Discount for products in first basket %v\n", r.TotalDiscountedPrice)

		case r.Carrot.Weight > 2:
			r.Carrot.Price = (r.Carrot.Weight - 1) * pricePerWeight
			r.Cucumber.Price = r.Cucumber.Unit * pricePerUnit
			// To calculate the discount price
			r.Carrot.DiscountPrice = pricePerWeight + r.Carrot.Price - (r.Carrot.Price * Discount / 100)
			r.Cucumber.DiscountPrice = r.Cucumber.Price - (r.Cucumber.Price * Discount / 100)
			r.TotalDiscountedPrice = r.Carrot.DiscountPrice + r.Cucumber.DiscountPrice
			fmt.Printf("Discount for products in second basket %v\n", r.TotalDiscountedPrice)
		}

	}

}