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A0A0 Interpreter https://esolangs.org/wiki/A0A0
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| import java.math.BigInteger; | |
| import java.util.ArrayList; | |
| import java.util.List; | |
| import java.util.Scanner; | |
| import java.util.regex.Matcher; | |
| import java.util.regex.Pattern; | |
| import java.util.stream.Collectors; | |
| public class Main { | |
| /* | |
| Example Input: Doubling numbers infinitely (doubles the inputted number infinitely: 3 -> 6, 12, 24, 48, ...) (Ctrl + V): | |
| I0 | |
| A0 A0 | |
| A0 C3 G1 G1 G1 A0 | |
| A0 V0 S0 V0 O0 A0 | |
| A0 A1 G-3 G-3 G-3 A0 | |
| G-3 | |
| ------------ | |
| 3 | |
| */ | |
| public static void main(String[] args) { | |
| Scanner scanner = new Scanner(System.in); | |
| System.out.println("Insert A0A0 code followed by a series of \"------------\":"); | |
| List<String> lines = new ArrayList<>(); | |
| int index = 0; | |
| while (scanner.hasNext()) { | |
| String input = scanner.nextLine(); | |
| if (input.startsWith("-")) break; | |
| if (input.startsWith(">")) { | |
| index = lines.size(); | |
| input = input.substring(1); | |
| } | |
| lines.add(input); | |
| } | |
| execute(lines, index, scanner); | |
| } | |
| private static void execute(List<String> lines, int index, Scanner scanner) { | |
| lines = lines.stream().map(s -> s.replace(" ", "")).collect(Collectors.toList()); | |
| BigInteger operand = null; | |
| Pattern p = Pattern.compile("-?\\d+"); | |
| while (true) { | |
| String oldLine = lines.get(index); | |
| if (oldLine.equals("")) break; | |
| Matcher m = p.matcher(oldLine); | |
| m.find(); | |
| char c = oldLine.charAt(0); | |
| BigInteger arg = new BigInteger(m.group()); | |
| String line = oldLine.substring(m.end()); | |
| lines.set(index, line); | |
| switch (c) { | |
| case 'A': | |
| if (index + arg.intValue() > lines.size()) System.exit(0); | |
| else if (index + arg.intValue() == lines.size()) lines.add(line); | |
| else lines.set(index + arg.intValue(), lines.get(index + arg.intValue()) + line); | |
| break; | |
| case 'C': | |
| if (index + arg.intValue() >= 0 && index + arg.intValue() < lines.size()) | |
| lines.remove(index + arg.intValue()); | |
| break; | |
| case 'G': | |
| index += arg.intValue(); | |
| break; | |
| case 'V': | |
| if (operand == null) operand = arg; | |
| lines.set(index, line.replaceFirst(p.pattern(), operand.toString())); | |
| break; | |
| case 'S': | |
| if (operand != null) | |
| operand = operand.add(arg); | |
| break; | |
| case 'D': | |
| if (operand != null) | |
| operand = operand.subtract(arg); | |
| break; | |
| case 'M': | |
| if (operand != null) | |
| operand = operand.multiply(arg); | |
| break; | |
| case 'L': | |
| if (operand != null) | |
| operand = new BigInteger(String.valueOf(operand.compareTo(arg))); | |
| break; | |
| case 'I': | |
| if (scanner.hasNext()) { | |
| if (arg.intValue() == 0) { | |
| operand = new BigInteger(String.valueOf(scanner.nextInt())); | |
| } | |
| if (arg.intValue() == 1) | |
| operand = new BigInteger(String.valueOf((int) scanner.next().charAt(0))); | |
| } | |
| break; | |
| case 'O': | |
| System.out.println(arg); | |
| break; | |
| case 'P': | |
| System.out.print((char) (arg.intValue() % 256)); | |
| break; | |
| } | |
| if (c != 'G') index++; | |
| if (index >= lines.size()) break; | |
| } | |
| } | |
| } |
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