67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
// part of chapter 9
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package main
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import "fmt"
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type Liters float64
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func (l Liters) String() string {
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return fmt.Sprintf("%0.2f L", l)
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}
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type Gallons float64
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func (g Gallons) String() string {
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return fmt.Sprintf("%0.2f gal", g)
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}
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type Milliliters float64
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func (m Milliliters) String() string {
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return fmt.Sprintf("%0.2f mL", m)
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}
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func (l Liters) ToGallons() Gallons {
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return Gallons(l * 0.264)
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}
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func (m Milliliters) ToGallons() Gallons {
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return Gallons(m * 0.000264)
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}
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func (g Gallons) ToLiters() Liters {
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return Liters(g * 3.785)
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}
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func (g Gallons) ToMilliliters() Milliliters {
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return Milliliters(g * 3785.41)
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}
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func fuel() {
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// long version
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//var carFuel Gallons
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//var busFuel Liters
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//carFuel = Gallons(10.0)
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//busFuel = Liters(240.0)
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// short version
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soda := Liters(2)
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fmt.Printf("%0.0f liters equals %0.3f gallons\n", soda, soda.ToGallons())
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water := Milliliters(500)
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fmt.Printf("%0.0f milliliters equals %0.3f gallons \n", water, water.ToGallons())
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//carFuel := Gallons(10.0)
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//busFuel := Liters(240.0)
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//
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////if you want to convert between types, save variable with correct calculation
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//carFuel += ToGallons(Liters(40.0))
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//busFuel += ToLiters(Gallons(30.0))
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//fmt.Printf("Car Fuel: %0.1f gallons\n", carFuel)
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//fmt.Printf("Bus Fuel: %0.1f liters\n", busFuel)
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milk := Gallons(2)
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fmt.Printf("%0.0f gallons equals %0.3f liters\n", milk, milk.ToLiters())
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fmt.Printf("%0.0f gallons equals %0.3f milliliters\n", milk, milk.ToMilliliters())
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fmt.Println(Gallons(12.09285934))
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fmt.Println(Liters(12.09285934))
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fmt.Println(Milliliters(12.09285934))
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}
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