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• Ray_Mints 1 год ago # 0

  public class MathGame {
  
    private static final Map<String, Integer> result = new LinkedHashMap<>();
    private final Random random = new Random();
  
    public void runMathProblems(int times) {
  
      for (int i = 0; i < times; i++) {
        int a = randomSingleDigitInt();
        int b = randomSingleDigitInt();
        Sign sign = randomSign();
  
        String problem = a + " " + sign.getSymbol() + " " + b;
  
        if (result.containsKey(problem)) {
          continue;
        }
  
        result.put(problem, calculate(a, sign, b));
      }
    }
  
    public static Map<String, Integer> getResultCopy() {
      return Collections.unmodifiableMap(new LinkedHashMap<>(result));
    }
  
    private int randomSingleDigitInt() {
      return random.nextInt(10);
    }
  
    private Sign randomSign() {
      Sign[] signs = Sign.values();
      return signs[random.nextInt(signs.length)];
    }
  
    private int calculate(int a, Sign sign, int b) {
      switch (sign) {
        case PLUS:
          return a + b;
        case MINUS:
          return a - b;
        case TIMES:
          return a * b;
      }
      return 0;
    }
  
  }
  
  public enum Sign {
    PLUS("+"),
    MINUS("-"),
    TIMES("*");
  
    private final String symbol;
  
    Sign(String symbol) {
      this.symbol = symbol;
    }
  
    public String getSymbol() {
      return symbol;
    }
  
  }
  
  public class Main {
    public static void main(String[] args) {
      MathGame mathGame = new MathGame();
  
      mathGame.runMathProblems(4);
      printDataAndResult();
  
  //    mathGame.runMathProblems(5);
  //    printDataAndResult();
    }
  
    public static void printDataAndResult() {
      String delimiter = " -> ";
  
      System.out.println("data:");
      int i = 1;
      for (String problem: MathGame.getResultCopy().keySet()) {
        System.out.println(i + delimiter + problem);
        i++;
      }
  
      System.out.println("\nresult:");
      MathGame.getResultCopy().forEach((key, value) -> System.out.println(key + " = ???" + delimiter + value));
    }
  
  }

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