Just toying around with Go

test.go

package main

import (
    "fmt"
    "math"
)

const POUNDS_IN_GRAM float64 = 0.00220462
const OUNCES_IN_GRAM float64 = 16.0

type Thinger interface {
    Name() string
    SetGrams(float64)
    WeightGrams() float64
    WeightPounds() float64
    WeightPoundsOunces() (int64, float64)
}

type Thing struct {
    name  string
    grams float64
}

func NewThing(name string, grams float64) *Thing {
    return &Thing{fmt.Sprintf("Thing%s", name), grams}
}

func (self *Thing) SetGrams(grams float64) {
    self.grams = grams
}

func (self Thing) Name() string {
    return self.name
}

func (self Thing) WeightGrams() float64 {
    return self.grams
}

func (self Thing) WeightPounds() float64 {
    return self.grams * POUNDS_IN_GRAM
}

func (self Thing) WeightPoundsOunces() (int64, float64) {
    lbs_fraction := self.WeightPounds()
    lbs := math.Floor(lbs_fraction)
    ozs := (lbs_fraction - lbs) * OUNCES_IN_GRAM
    return int64(lbs), ozs
}

func main() {
    var T Thinger

    t := NewThing("Mark", 2450.0)
    T = t
    lbs, ozs := T.WeightPoundsOunces()
    fmt.Println(T.Name(), "Weight in Grams =", T.WeightGrams())
    fmt.Println(T.Name(), "Weight in Pounds =", T.WeightPounds())
    fmt.Println(T.Name(), "Weight in Pounds and Ounces =", lbs, "lbs", ozs, "ozs")
    T.SetGrams(2091020.0)
    lbs, ozs = T.WeightPoundsOunces()
    fmt.Println(T.Name(), "Weight in Grams =", T.WeightGrams())
    fmt.Println(T.Name(), "Weight in Pounds =", T.WeightPounds())
    fmt.Println(T.Name(), "Weight in Pounds and Ounces =", lbs, "lbs", ozs, "ozs")
}