import java.math.BigInteger; import java.util.Scanner; public class Calc { public static void main(String[] args) { Scanner input = new Scanner(System.in); String prompt = "> "; System.out.print(prompt); while (input.hasNext()) { if (input.hasNext("quit")) { break; } BigInteger x = input.nextBigInteger(); String operator = input.next(); BigInteger y = input.nextBigInteger(); BigInteger result = BigInteger.ZERO; if (operator.equals("+")) { result = x.add(y); } else if (operator.equals("*")) { result = x.multiply(y); } else if (operator.equals("/")) { result = x.divide(y); } else if (operator.equals("-")) { result = x.subtract(y); } else if (operator.equals("**")) { int yint = y.intValue(); result = x.pow(yint); } System.out.println(result); System.out.print(prompt); } } }