1 files changed, 7 insertions, 1 deletions
diff --git a/Calculator.java b/Calculator.java
index 031fa57..43804c3 100644
--- a/Calculator.java
+++ b/Calculator.java
@@ -1,8 +1,14 @@
 public class Calculator {
     public static void main(String[] args) {
         String expr = "(84 / 4 * 3 - 9) * 2 + 1 / 5"; // 108.2
-        Parser p = new Parser(expr);
+        Parser p;
+        if (args.length == 0) {
+            p = new Parser(expr);
+        } else {
+            p = new Parser(args[0]);
+        }
         String postfix = p.toPostFix();
+        // System.out.println("pfix => \t " + postfix);
         System.out.println(p.evalExpr(postfix));
     }
 }