revers

void revers(data *head)
{
    data *temp = head;
    data *n = NULL,*p = NULL;
    while(temp != NULL)
    {
        n = temp -> next;
        temp -> next = p;
        p = temp;
        temp = n;
    }
    head = p;
    while(head != NULL)
    {
        printf("%d ",head -> age);
        head = head -> next;
    }
    printf("\n");
}