import game.Gamer
fun main(args: Array<String>) {
val gamer = Gamer(100)
var memento = gamer.createMemento()
for (i in 0 until 100) {
println("====${i}")
println("現状：${gamer}")
gamer.bet()
println("所持金は${gamer.getMoney()}円になりました")
if (gamer.getMoney() > memento.getMoney()) {
println(" （だいぶ増えたので、現在の状態を保存しておこう）")
memento = gamer.createMemento()
}else if (gamer.getMoney() < memento.getMoney() / 2) {
println(" （だいぶ減ったので、以前の状態に復帰しよう")
gamer.restoreMemento(memento)
}
try {
Thread.sleep(1000)
} catch (e: InterruptedException) {
}
println("")
}
}
Gamer.kt
package game
import java.util.*
import kotlin.collections.ArrayList
class Memento(internal var money:Int,private var fruits:ArrayList<String> = arrayListOf()) {
fun getMoney() = money
internal fun addFruit(fruit: String) {
fruits.add(fruit)
}
internal fun getFruits() = fruits.clone()
}
class Gamer(private var money: Int){
private var fruits = arrayListOf<String>()
private val random = Random()
companion object {
val fruitsname = arrayOf("リンゴ","バナナ","ブドウ","みかん")
}
fun getMoney() = money
fun bet() {
val dice = random.nextInt(6) + 1
if (dice == 1) {
money += 100
println("所持金が増えました")
}else if (dice == 2) {
money /= 2
println("所持金が半分になりました")
}else if (dice == 6) {
val f = getFruit()
println("フルーツ(${f})をもらいました")
fruits.add(f)
} else {
println("何も起こりませんでした")
}
}
fun createMemento(): Memento {
val m = Memento(money)
val it = fruits.iterator()
while (it.hasNext()) {
val f = it.next()
if (f.startsWith("おいしい")) {
m.addFruit(f)
}
}
return m
}
fun restoreMemento(memento: Memento) {
this.money = memento.money
this.fruits = memento.getFruits() as ArrayList<String>
}
override fun toString(): String {
return "[money = ${money} + , fruits = ${fruits} ]"
}
private fun getFruit(): String {
var prefix = ""
if (random.nextBoolean()) {
prefix = "おいしい"
}
return "${prefix}${fruitsname[random.nextInt(fruitsname.size)]}"
}
}
hyuki@hyuki.com This software is provided ‘as-is’, without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution.
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