// ==========================================================================
// $Id: colinterface.go,v 1.1 2014/03/31 21:34:24 jlang Exp $
// CSI2120 GO: Interfaces
// ==========================================================================
// (C)opyright:
//
//   Jochen Lang
//   EECS, University of Ottawa
//   800 King Edward Ave.
//   Ottawa, On., K1N 6N5
//   Canada. 
//   http://www.eecs.uottawa.ca
// 
// Creator: Jochen Lang (based on example by R. Laganiere)
// Email:   jlang@eecs.uottawa.ca
// ==========================================================================
// $Log: colinterface.go,v $
// Revision 1.1  2014/03/31 21:34:24  jlang
// "Added examples for file I/O, methods, interfaces"
//
// ==========================================================================
package main

import (
	"fmt"
)


func main() {
	table := [...]Color{
		&ColorPt{Point{1.1,2.2},"red"},
		&Box{32.4, "yellow"},
		&ColorPt{Point{3.1,1.2},"blue"}}

	for _,element := range table {
		fmt.Printf("color= %s\n", element.Color())
	}	
}


type Point struct {
	x float64
	y float64
}

type ColorPt struct {
	pt Point
	color string
}

type Box struct {
	weight float64
	color string
}

// interface implemented by ColorPt and Box
type Color interface {
	SetColor(string)
	Color() string
}

// Interface implementation for type ColorPt
func (p *ColorPt) Color() string {
	return p.color
}

func (p *ColorPt) SetColor(col string) {
	p.color = col
}

// Interface implementation for type Box
func (p *Box) SetColor(col string) {
	p.color = col
}

func (p *Box) Color() string {
	return p.color
}