package main

/**
* A program to implement dollars and euros
* With good printing for each and conversions between
* Created Sep 19, 2023
* gtowell
 */
import "fmt"

// a type for dollars
type dollars float64

// toString method for dollars
func (this dollars) String() string {
	return fmt.Sprintf("$%.2f", this)
}

// Convert dollars to euros
func (this dollars) toEuros() euros {
	return euros(float64(this) / 1.07)
}

// A type for euros
type euros float64

// toString method for euros
func (this euros) String() string {
	return fmt.Sprintf("€%0.2f", this)
}

// convert euros to dollars
func (this euros) toDollars() dollars {
	return dollars(this * euros(1.07));
}

// using the euro and dollar types
func main() {
	aa := 7.2128731278

	dol := dollars(aa) // just cast float 64 to $
	eur := dol.toEuros() // convert $ to € using the method on dollars

	fmt.Printf("float64  %v\n", aa)
	fmt.Printf("dollars  %v\n", dol)
	fmt.Printf("euros    %v\n", eur)
}