public class Main {
static Scanner scan = new Scanner(System.in);
static int var1, var2;
static char operation;
static int result;
public static void main(String[] args) {
System.out.println("Введите два числа : ");
String userInput = scan.nextLine();
char[] oper_char = new char[10];
for (int i = 0; i < userInput.length(); i++) {
oper_char[i] = userInput.charAt(i);
if (oper_char[i] == '+') {
operation = '+';
}
if (oper_char[i] == '-') {
operation = '-';
}
if (oper_char[i] == '*') {
operation = '*';
}
if (oper_char[i] == '/') {
operation = '/';
}
}
String oper_charString = String.valueOf(oper_char);
String[] signs = oper_charString.split("[+-/*]");
String stb0 = signs[0];
String stb1 = signs[1];
String strings = stb1.trim();
var1 = Enum.convertRomanToArab(stb0);
var2 = Enum.convertRomanToArab(strings);
if (signs.length > 2
)
throw new ArrayIndexOutOfBoundsException("Не более двух операндов!");
else
signs = Arrays.copyOf(signs, 2);
try {
stb0 = signs[0].trim();
} catch (NullPointerException e) {
throw new NullPointerException();
}
if (var1 < 0 && var2 < 0) {
result = 0;
} else {
result = Enum.calc(var1, var2, operation);
System.out.println("Результат RomanNum:");
String resultRoman = Enum.convertNumToRoman(result);
System.out.println(stb0 + " " + operation + " " + strings + " = " + resultRoman);
}
var1 = Enum.convertRomanToArab(stb0);
if (var1 == -1) var1 = Integer.parseInt(stb0);
var2 = Enum.convertRomanToArab(strings);
if (var2 == -1) var2 = Integer.parseInt(strings);
result = Enum.calc(var2, var2, operation);
System.out.println("Результат ArabNum:");
System.out.println(var1 + " " + operation + " " + var2 + " = " + result);
}
}
class Enum {
static String convertNumToRoman(int numArabian) {
String[] roman = {"O", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII", "XIII", "XIV", "XV", "XVI", "XVII", "XVIII", "XIX", "XX",
"XXI", "XXII", "XXIII", "XXIV", "XXV", "XXVI", "XXVII", "XXVIII", "XXIX", "XXX", "XXXI", "XXXII", "XXXIII", "XXXIV", "XXXV", "XXXVI", "XXXVII", "XXXVIII", "XXXIX", "XL",
"XLI", "XLII", "XLIII", "XLIV", "XLV", "XLVI", "XLVII", "XLVIII", "XLIX", "L", "LI", "LII", "LIII", "LIV", "LV", "LVI", "LVII", "LVIII", "LIX", "LX",
"LXI", "LXII", "LXIII", "LXIV", "LXV", "LXVI", "LXVII", "LXVIII", "LXIX", "LXX",
"LXXI", "LXXII", "LXXIII", "LXXIV", "LXXV", "LXXVI", "LXXVII", "LXXVIII", "LXXIX", "LXXX",
"LXXXI", "LXXXII", "LXXXIII", "LXXXIV", "LXXXV", "LXXXVI", "LXXXVII", "LXXXVIII", "LXXXIX", "XC",
"XCI", "XCII", "XCIII", "XCIV", "XCV", "XCVI", "XCVII", "XCVIII", "XCIX", "C"
};
final String s = roman[numArabian];
return s;
}
static int convertRomanToArab (String numRoman) {
try {
switch (numRoman) {
case "I" -> {return 1;}
case "II" -> {return 2;}
case "III" -> {return 3;}
case "IV" -> {return 4;}
case "V" -> {return 5;}
case "VI" -> {return 6;}
case "VII" -> {return 7;}
case "VIII" -> {return 8;}
case "IX" -> {return 9;}
case "X" -> {return 10;}
}
} catch (InputMismatchException e) {
throw new InputMismatchException();
} return -1;
}
public static int calc(int num1, int num2, char znak) {
if (num1 <= 0 || num1 > 10 || num2 <= 0 || num2 > 10) throw new IllegalArgumentException("Число больше 10");
int result = 0;
switch (znak) {
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case '*':
result = num1 * num2;
break;
case '/':
try {
result = num1 / num2;
} catch (ArithmeticException | InputMismatchException e) {
System.out.println("Exception : " + e);
System.out.println("Допускаются только целые числа");
break;
}
break;
default:
throw new IllegalArgumentException("Не верный знак!");
}
return result;
}
}
