// Chapter 28 example: a slice of pointers. range copies the pointer, and the
// copy still points at the same critter.
// Run with: go run exercises/28/03-pointer-slice.go

package main

import "fmt"

type critter struct {
	name   string
	energy int
}

func newCritter(name string, energy int) *critter {
	return &critter{name: name, energy: energy}
}

func (c *critter) play() {
	c.energy = c.energy - 1
	fmt.Printf("%s plays. Energy: %d\n", c.name, c.energy)
}

func main() {
	critters := []*critter{
		newCritter("Spark", 3),
		newCritter("Bolt", 2),
	}

	for _, c := range critters {
		c.play()
	}
	for _, c := range critters {
		c.play()
	}

	fmt.Println(critters[0].energy) // 1
	fmt.Println(critters[1].energy) // 0
}