package main

import "fmt"

type character struct {
	name  string
	hp    int
	maxHP int
}

func newCharacter(name string, hp int) *character {
	return &character{name: name, hp: hp, maxHP: hp}
}

func (c *character) takeDamage(amount int) {
	c.hp = c.hp - amount
	if c.hp < 0 {
		c.hp = 0
	}
}

func (c *character) heal(amount int) {
	c.hp = c.hp + amount
	if c.hp > c.maxHP {
		c.hp = c.maxHP
	}
}

func (c *character) isAlive() bool {
	return c.hp > 0
}

func (c *character) report() {
	fmt.Printf("%s: %d / %d HP (alive: %v)\n", c.name, c.hp, c.maxHP, c.isAlive())
}

func main() {
	keiko := newCharacter("Keiko", 100)
	keiko.report()

	keiko.takeDamage(30)
	keiko.report()

	keiko.takeDamage(80)
	keiko.report()

	keiko.heal(20)
	keiko.report()
}