Head First Kotlin程序设计

你现在的位置 4 83

functions

函数

向

Game.kt

中添加

getUserChoice

函数

下面是更改过的本应用代码，包括完整的getUserChoice

函数。请更新你的

Game.kt

，使其匹配我们的版本（我们更

改的部分以粗体标出）：

fun main(args: Array<String>) {

val options = arrayOf("Rock", "Paper", "Scissors")

val gameChoice = getGameChoice(options)

val userChoice = getUserChoice(options)

}

fun getGameChoice(optionsParam: Array<String>) =

optionsParam[(Math.random() * optionsParam.size).toInt()]

fun getUserChoice(optionsParam: Array<String>): String {

var isValidChoice = false

var userChoice = ""

//Loop until the user enters a valid choice

while (!isValidChoice) {

//Ask the user for their choice

print("Please enter one of the following:")

for (item in ...