| 1 | import java.util.Scanner; |
| 2 | |
| 3 | public class Calculator { |
| 4 | public static void main(String[] args) { |
| 5 | // String expr = "(84 / 4 * 3 - 9) * 2 + 1 / 5"; // 108.2 |
| 6 | String expr = new String(" "); |
| 7 | Scanner sc = new Scanner(System.in); |
| 8 | Parser p; |
| 9 | |
| 10 | if (args.length == 0) { |
| 11 | new GFrame("Calculator"); |
| 12 | } else { |
| 13 | if (args[0].equals("-n")) { |
| 14 | System.out.println("Type \"exit\" or Ctrl+C to exit."); |
| 15 | while (true) { |
| 16 | System.out.print(">>> "); |
| 17 | expr = sc.nextLine(); |
| 18 | if (!expr.equals("exit")) { |
| 19 | p = new Parser(expr); |
| 20 | System.out.println(p.eval()); |
| 21 | } else { |
| 22 | sc.close(); |
| 23 | break; |
| 24 | } |
| 25 | } |
| 26 | } else { |
| 27 | } |
| 28 | } |
| 29 | } |
| 30 | } |