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  1. import java.util.Random;
  2. import java.util.Scanner;
  3.  
  4. public class Main {
  5.     public static void main(String[] args) {
  6.         String[] player = {"あなた", "コンピュータ"};
  7.         String[] message = {String.format("%sが%s個取った", player[1], "%d"), "石を取って!(1〜%d) > ", "現在の石の数: %d\n", "%sの勝ち\n"};
  8.         Random rnd = new Random();
  9.         int iVal = rnd.nextInt(2);
  10.         int[] env = {15, iVal, iVal, 0, 0};
  11.         System.out.println(String.format("%sが先行", player[iVal]));
  12.         while (true) {
  13.             env = print(eval(read(env, message), env), message);
  14.             if (env[0] < 1) {
  15.                 System.out.printf(String.format(message[3], player[env[1]]));
  16.                 break;
  17.             }
  18.         }
  19.     }
  20.     public static int read(int[] env, String[] prompt) {
  21.         Scanner scanner = new Scanner(System.in);
  22.         int num = -1;
  23.         if (env[1] == 0) {
  24.             while (true) {
  25.                 System.out.printf(prompt[1], env[0] > 3 ? 3 : env[0]);
  26.                 num = scanner.nextInt();
  27.                 if (env[0] > 3) {
  28.                     if ((num > 0) && (num < 4)) {
  29.                         break;
  30.                     }
  31.                 } else {
  32.                     if ((num > 0) && (num < env[0] + 1)) {
  33.                         break;
  34.                     }
  35.                 }
  36.             }
  37.         }
  38.         return num;
  39.     }
  40.     public static int[] eval(int x, int[] env) {
  41.         if (env[1] == 0) {
  42.             env[0] -= x;
  43.             env[1] = 1;
  44.             env[3] = x;
  45.         } else {
  46.             if (env[2] == 0) {
  47.                 if (env[0] % 4 == 1) {
  48.                     switch (env[3]) {
  49.                         case 1:
  50.                             env[4] = 3;
  51.                         case 2:
  52.                             env[4] = 2;
  53.                         default:
  54.                             env[4] = 1;
  55.                     }
  56.                 } else {
  57.                     Random rnd = new Random();
  58.                     if (env[0] > 3) {
  59.                         env[4] = rnd.nextInt(3) + 1;
  60.                     } else {
  61.                         env[4] = rnd.nextInt(env[0]) + 1;
  62.                     }
  63.                 }
  64.             } else {
  65.                 switch (env[0] % 4) {
  66.                     case 0:
  67.                         env[4] = 3;
  68.                         break;
  69.                     case 2:
  70.                         env[4] = 1;
  71.                         break;
  72.                     default:
  73.                         env[4] = 2;
  74.                 }
  75.             }
  76.             env[0] -= env[4];
  77.             env[1] = 0;
  78.         }
  79.         return env;
  80.     }
  81.     public static int[] print(int[] env, String[] message) {
  82.         if (env[1] == 0) {
  83.             System.out.println(String.format(message[env[1]], env[4]));
  84.         }
  85.         System.out.println(String.format(message[2], env[0]));
  86.         return env;
  87.     }
  88. }
  89.  
  90.  
Runtime error #stdin #stdout #stderr 0.13s 51484KB
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stdin
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Standard input is empty
stdout
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コンピュータが先行
コンピュータが2個取った
現在の石の数: 13

石を取って!(1〜3) >
stderr
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Exception in thread "main" java.util.NoSuchElementException
	at java.base/java.util.Scanner.throwFor(Scanner.java:937)
	at java.base/java.util.Scanner.next(Scanner.java:1594)
	at java.base/java.util.Scanner.nextInt(Scanner.java:2258)
	at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
	at Main.read(Main.java:26)
	at Main.main(Main.java:13)
https://ideone.com/xVPJVC
language:
Java (HotSpot 12)
created:
1 year ago
visibility:
secret

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