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  1. #include <stdio.h>
  2. #include<stdlib.h>
  3.  
  4. struct node
  5. {
  6.     int number;
  7.     struct node *next;
  8. };
  9.  
  10. void addNodeSingle(struct node **head, int num, int thesi)
  11. {
  12.     if (*head == NULL)
  13.     {
  14.         struct node *current;
  15.         current = (struct node*) malloc (1*sizeof(struct node));
  16.         current -> number = num;
  17.         current -> next = NULL;
  18.         *head = current;
  19.     }
  20.  
  21.     else
  22.     {
  23.         if (thesi == 0)
  24.         {
  25.             struct node *current;
  26.             current = (struct node*) malloc (1*sizeof(struct node));
  27.             current -> number = num;
  28.             current -> next = *head;
  29.             *head = current;
  30.         }
  31.  
  32.         else
  33.         {
  34.             struct node *current, *temp;
  35.             current = (struct node*) malloc (1*sizeof(struct node));
  36.             current -> number = num;
  37.             temp = *head;
  38.             while (temp -> next != NULL)
  39.                 temp = temp -> next;
  40.  
  41.             temp -> next = current;
  42.             current -> next = NULL;
  43.         }
  44.     }
  45. }
  46.  
  47. void displayList(struct node **head) //Erotima 4o
  48. {
  49.     struct node *current;
  50.     if(*head == NULL)
  51.         printf("I lista einai adeia!\n");
  52.  
  53.     else
  54.     {
  55.     current= *head ;
  56.         while(current != NULL)
  57.         {
  58.             printf("%d ",current -> number);
  59.             current = current -> next;
  60.         }
  61.     }
  62. }
  63.  
  64. void swapElements1(struct node **head)
  65. {
  66.     struct node *current, *temp;
  67.     current = temp = *head;
  68.  
  69.     while(current != NULL)
  70.     {
  71.         temp = current;
  72.         current = current -> next;
  73.     }
  74.  
  75.     *head = (*head)->next;
  76.     *head = temp;
  77.     current = NULL;
  78. }
  79.  
  80. int main()
  81. {
  82.     struct node *head;
  83.     head = NULL;
  84.  
  85.     addNodeSingle(&head,5,1);
  86.     addNodeSingle(&head,6,1);
  87.     addNodeSingle(&head,2,0);
  88.     addNodeSingle(&head,7,0);
  89.     addNodeSingle(&head,8,0);
  90.  
  91.     printf("List is: ");
  92.     displayList(&head);
  93.     swapElements1(&head);
  94.     printf("\nNew list is: ");
  95.     displayList(&head);
  96. }
Success #stdin #stdout 0s 2300KB
comments (?)
stdin
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Standard input is empty
stdout
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List is: 8 7 2 5 6 
New list is: 6
https://ideone.com/ztzJ4h
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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