From f8d523af706aa4dd8c5ff23dfa33f2a7c5e4ef2c Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <smadurange@users.noreply.github.com>
Date: Wed, 8 Dec 2021 18:50:25 +0800
Subject: 4.4

---
 4/4.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to '4')

diff --git a/4/4.c b/4/4.c
index 5333ba3..ccea5e8 100644
--- a/4/4.c
+++ b/4/4.c
@@ -32,7 +32,7 @@ double peek();
  * (swap top two stack positions), d (clear stack) */
 int main(int argc, char *argv[]) {
   int type;
-  double op2;
+  double op2, op1;
   char s[MAXOP];
 
   while ((type = getop(s)) != EOF) {
@@ -70,6 +70,12 @@ int main(int argc, char *argv[]) {
     case 'c':
       push(peek());
       break;
+    case 's':
+      op2 = pop();
+      op1 = pop();
+      push(op2);
+      push(op1);
+      break;
     case '\n':
       printf("\t%.8g\n", pop());
       break;
-- 
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