From 6f52254a9003f2c9f704edc19db7ea1a9d7c2b7b Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <smadurange@users.noreply.github.com>
Date: Sun, 12 Dec 2021 17:02:14 +0800
Subject: 4.9

---
 4/9.c | 1 +
 1 file changed, 1 insertion(+)

(limited to '4/9.c')

diff --git a/4/9.c b/4/9.c
index 0a9fb26..2392b40 100644
--- a/4/9.c
+++ b/4/9.c
@@ -171,6 +171,7 @@ int getop(char s[]) {
     ;
   s[1] = 0;
 
+  // solution to 4.9: exit program by returning EOF to main
   if (c == EOF)
     return EOF;
 
-- 
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