enum class BeerType{LIGHT_LAGER,LIGHT_HYBRIO,BOCK,AMBER_HYBRID,FRUIT}
enum class WineType{WHITE,ROSE,RED,SPARKLING,DESSERT}
class Beer(var name: String, var beerType: BeerType, var cost:Int)
class Wine(var name: String, var WineType: WineType, var cost:Int)
fun Beer.print(){
println("name : $name , beerType : $beerType , BeerType : $cost")
}
fun Beer.change_price(print:Int){
}
fun main(){
var beer1 = Beer("Hite",BeerType.FRUIT,200)
var beer2 = Beer("Cass",BeerType.LIGHT_HYBRIO,200)
beer1.change_price(600)
beer1.print()
beer2.change_price(600)
beer2.print()
var wine1 = Wine("Cabernet",WineType.RED,10)
var wine2 = Wine("Chardonnay",WineType.WHITE,12)
}
请问如何Beer.print()输出的价格200改为 beer1.change_price(600)