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circular_linked.c

@@ -0,0 +1,66 @@
+// C program to implement 
+// the above approach 
+#include<stdio.h> 
+#include<stdlib.h> 
+
+/* structure for a node */
+struct Node 
+{ 
+	int data; 
+	struct Node *next; 
+}; 
+
+/* Function to insert a node at the beginning of a Circular 
+linked list */
+void push(struct Node **head_ref, int data) 
+{ 
+	struct Node *ptr1 = (struct Node *)malloc(sizeof(struct Node)); 
+	struct Node *temp = *head_ref; 
+	ptr1->data = data; 
+	ptr1->next = *head_ref; 
+
+	/* If linked list is not NULL then set the next of last node */
+	if (*head_ref != NULL) 
+	{ 
+		while (temp->next != *head_ref) 
+			temp = temp->next; 
+		temp->next = ptr1; 
+	} 
+	else
+		ptr1->next = ptr1; /*For the first node */
+
+	*head_ref = ptr1; 
+} 
+
+/* Function to print nodes in a given Circular linked list */
+void printList(struct Node *head) 
+{ 
+	struct Node *temp = head; 
+	if (head != NULL) 
+	{ 
+		do
+		{ 
+			printf("%d ", temp->data); 
+			temp = temp->next; 
+		} 
+		while (temp != head); 
+	} 
+} 
+
+/* Driver program to test above functions */
+int main() 
+{ 
+	/* Initialize lists as empty */
+	struct Node *head = NULL; 
+
+	/* Created linked list will be 11->2->56->12 */
+	push(&head, 12); 
+	push(&head, 56); 
+	push(&head, 2); 
+	push(&head, 11); 
+
+	printf("Contents of Circular Linked List\n "); 
+	printList(head); 
+
+	return 0; 
+}