Update and rename CircularLinkedList.cpp to CircularLinkedList.c

data_structures/Cpp/Linked List/CircularLinkedList.c

@@ -0,0 +1,53 @@
+#include<stdio.h>
+#include<stdlib.h>
+struct node
+{
+    int data;
+    struct node * next;
+};
+void traverselist(struct node * head)
+{
+    struct node * p=head;
+    do
+    {
+      printf("%d\n",p->data);
+      p=p->next;
+    } while (p!=head);
+
+}
+struct node * insertatfirst(struct node * head, int data)
+{
+    struct node * ptr=(struct node *)malloc(sizeof(struct node));
+    ptr->data=data;
+    struct node * p=head;
+    while (p->next!=head)
+    {
+        p=p->next;
+    }
+    p->next=ptr;
+    ptr->next=head;
+    head=ptr;
+    return head;
+
+}
+int main()
+{
+    struct node * head=(struct node *)malloc(sizeof(struct node));
+    struct node * second=(struct node *)malloc(sizeof(struct node));
+    struct node * third=(struct node *)malloc(sizeof(struct node));
+    struct node * fourth=(struct node *)malloc(sizeof(struct node));
+    head->data=4;
+    head->next=second;
+    second->data=5;
+    second->next=third;
+    third->data=6;
+    third->next=fourth;
+    fourth->data=7;
+    fourth->next=head;
+    printf("list before the insertion\n");
+    traverselist(head);
+    head=insertatfirst(head,3);
+    printf("list after insertion is\n");
+    traverselist(head); 
+    return 0;
+}