From 481f76699e735feee502c1a80b910aca8e834d0d Mon Sep 17 00:00:00 2001
From: Reina Harrington-Affine <reinakobayashi1217@gmail.com>
Date: Tue, 2 Sep 2025 21:02:47 +0000
Subject: [PATCH] storage.txt is now created at runtime rather than being
 assumed to be present and empty. recall() now removes storage.txt at
 completion. main() now includes a check to see whether storage.txt already
 exists, sends an error message, and exits with code 1 if storage.txt is
 already present.

---
 KNR C/ex1-16-2.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/KNR C/ex1-16-2.c b/KNR C/ex1-16-2.c
index 22b4879..b37445a 100644
--- a/KNR C/ex1-16-2.c	
+++ b/KNR C/ex1-16-2.c	
@@ -1,4 +1,6 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
 
 void store();
 void enumerate();
@@ -7,6 +9,11 @@ int longest = 0;
 int posLongest = 0;
 
 int main(){
+	if((access("storage.txt",F_OK)) == 0){
+			printf("Error: storage file already exists.");
+			return 1;
+			EXIT_FAILURE;
+	}
 	store();
 	enumerate();
 	recall();
@@ -40,14 +47,14 @@ void enumerate(){
 		if(c != '\n'){
 			++length;
 			continue;
-	} else if(c == '\n' && length > longest){
-		longest = length;
-		length = 0;
-		posLongest = position;
-		++position;
-	} else if (c == '\n' && length < longest){ 
-		++position;
-		length = 0;
+		} else if(c == '\n' && length > longest){
+			longest = length;
+			length = 0;
+			posLongest = position;
+			++position;
+		} else if (c == '\n' && length < longest){ 
+			++position;
+			length = 0;
 	}
 	fclose (fp);
 }
@@ -72,4 +79,5 @@ void recall (){
 		}
 	}
 	fclose (fp);
+	remove("storage.txt");
 }