From c6070adb670cee86eb752ca5e8c2c8661be644bd Mon Sep 17 00:00:00 2001
From: Kris Lamoureux <kris@lamoureux.io>
Date: Tue, 30 Nov 2021 01:43:24 -0500
Subject: [PATCH] Exercise 1-18. Remove trailing blanks and tabs

---
 14-char-arrays.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/14-char-arrays.c b/14-char-arrays.c
index b528e89..bcd8fa5 100644
--- a/14-char-arrays.c
+++ b/14-char-arrays.c
@@ -4,6 +4,7 @@
 
 int getline(char line[], int maxline);
 void copy(char to[], char from[]);
+void trim(char line[], int len);
 
 /* print longest input line */
 main()
@@ -22,8 +23,10 @@ main()
 			if (c == '\n')
 				++len;
 		}
-		if (len >= MINLINE)
+		if (len >= MINLINE) {
+			trim(line, len);
 			printf("%s", line);
+		}
 	}
 	return 0;
 }
@@ -52,3 +55,15 @@ void copy(char to[], char from[])
 	while ((to[i] = from[i]) != '\0')
 		++i;
 }
+
+/* trim: remove extraneous blanks and tabs */
+void trim(char s[], int len)
+{
+	int i;
+
+	for (i = len-2; i >= 0; --i)
+		if (s[i] == ' ' || s[i] == '\t')
+			s[i] = '\0';
+		else
+			return;
+}