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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. //Declaration of Circular LL
  4.  struct CLLNode{
  5.     int data;
  6.     struct CLLNode* next;
  7. };
  8.  
  9. //Counting Nodes in a CLL
  10. int circularListLength(struct CLLNode* head){
  11.     struct CLLNode* current =head;
  12.     int count = 0;
  13.     if(head==NULL){
  14.         return 0;
  15.     }else{
  16.         do{
  17.             current = current->next;
  18.             count++;
  19.         }while (current!=head);
  20.     }
  21.       return count;
  22.  
  23. }
  24. void push(struct CLLNode** head,struct CLLNode** tail,int data){
  25.     struct CLLNode* newNode = (struct CLLNode*)malloc(sizeof(struct CLLNode));
  26.     newNode->data = data;
  27.     if(*head == NULL){
  28.         *head = newNode;
  29.         *tail = newNode;
  30.         newNode->next = *head;
  31.         return;
  32.     }else{
  33.         (*tail)->next = newNode;
  34.         *tail = newNode;
  35.         (*tail)->next = *head;
  36.         return;
  37.     }
  38. }
  39. //Prints the contents of CLL
  40. void printCLLData(struct CLLNode* head){
  41.     struct CLLNode* current = head;
  42.     if(head==NULL){
  43.         return;
  44.         // printf("List is empty!!!\n");
  45.     }else{
  46.         do{
  47.         printf("%d ",current->data);
  48.         current = current->next;
  49.     }while (current!=head);  
  50.  
  51.     }
  52.  
  53. }
  54. int main(){
  55.     struct CLLNode* head = NULL;
  56.     struct CLLNode* tail = NULL;
  57.  
  58.     push(&head,&tail,1);
  59.     push(&head,&tail,2);
  60.     push(&head,&tail,3);
  61.     push(&head,&tail,4);
  62.     push(&head,&tail,5);
  63.     push(&head,&tail,6);
  64.     printf("Circular linked list created:\n");
  65.     printCLLData(head);
  66.     printf("\nLenght of list:\n");
  67.     circularListLength(head);
  68.     return 0;
  69. }
Success #stdin #stdout 0s 5528KB
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stdin
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Standard input is empty
stdout
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Circular linked list created:
1 2 3 4 5 6 
Lenght of list:
https://ideone.com/fAFTh6
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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