From 22a179f2db4999dfb040fb396103403625188a06 Mon Sep 17 00:00:00 2001
From: stepfencurryxiao <stepfencurryxiao@gmail.com>
Date: Tue, 21 Apr 2020 18:38:03 +0800
Subject: [PATCH] Add return value in deque()

---
 data_structures/queue.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/data_structures/queue.c b/data_structures/queue.c
index 828d3f7a..df4d91f9 100644
--- a/data_structures/queue.c
+++ b/data_structures/queue.c
@@ -66,7 +66,7 @@ void enque(int x) {
  * Takes the next item from the Queue.
  */
 int deque() {
-    int returnData;
+    int returnData = 0;
     if(head == NULL) {
         printf("ERROR: Deque from empty queue.\n");
         exit(1);
@@ -78,6 +78,7 @@ int deque() {
             head = head->pre;
         head->next = NULL;
     }
+	return returnData;
 }
 
 /**