Evgeny Gerashchenko
66 lines
1.6 KiB
Kotlin
66 lines
1.6 KiB
Kotlin
import java.util.*
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import java.io.*
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fun takeFirst(expr: StringBuilder): Char {
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val c = expr.charAt(0)
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expr.deleteCharAt(0)
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return c
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}
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fun evaluateArg(expr: CharSequence, numbers: ArrayList<Int>): Int {
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if (expr.length == 0) throw Exception("Syntax error: Character expected");
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val c = takeFirst(<error>expr</error>)
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if (c >= '0' && c <= '9') {
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val n = c - '0'
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if (!numbers.contains(n)) throw Exception("You used incorrect number: " + n)
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numbers.remove(n)
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return n
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}
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throw Exception("Syntax error: Unrecognized character " + c)
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}
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fun evaluateAdd(expr: StringBuilder, numbers: ArrayList<Int>): Int {
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val lhs = evaluateArg(expr, numbers)
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if (expr.length() > 0) {
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}
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return lhs
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}
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fun evaluate(expr: StringBuilder, numbers: ArrayList<Int>): Int {
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val lhs = evaluateAdd(expr, numbers)
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if (expr.length() > 0) {
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val <warning>c</warning> = expr.charAt(0)
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expr.deleteCharAt(0)
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}
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return lhs
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}
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fun main(args: Array<String>) {
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System.out.println("24 game")
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val numbers = ArrayList<Int>(4)
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val rnd = Random();
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val prompt = StringBuilder()
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for(i in 0..3) {
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val n = rnd.nextInt(9) + 1
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numbers.add(n)
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if (i > 0) prompt.append(" ");
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prompt.append(n)
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}
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System.out.println("Your numbers: " + prompt)
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System.out.println("Enter your expression:")
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val reader = BufferedReader(InputStreamReader(System.`in`))
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val expr = StringBuilder(reader.readLine()!!)
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try {
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val result = evaluate(expr, numbers)
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if (result != 24)
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System.out.println("Sorry, that's " + result)
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else
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System.out.println("You won!");
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}
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catch(e: Throwable) {
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System.out.println(e.getMessage())
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}
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}
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