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  1. #include <iostream>
  2. #include <initializer_list>
  3.  
  4. struct Node
  5. {
  6.    char data;
  7.    Node*  next_node = nullptr;
  8.    Node(const char& a)  // create a constrcor which will initilize data
  9.       : data(a) {}      // at the time of Node creation
  10. };
  11.  
  12. namespace mylib{
  13. class list
  14. {
  15. private:
  16.    Node *head = nullptr;             // need only head, if it's a simple list
  17. public:
  18.    list()   :head(nullptr) {}   // constructor set it to nullptr
  19.    list(std::initializer_list<int> arr)  // initilizer list constructor
  20.    {
  21.       for(const auto& it: arr)
  22.          this->insert(it);
  23.    }
  24.    ~list()
  25.    {
  26.         Node* temp = head;
  27.         while( temp != nullptr )
  28.         {
  29.             Node* next = temp->next_node;
  30.             delete temp;
  31.             temp = next;
  32.         }
  33.         head = nullptr;
  34.    }
  35.  
  36.  
  37.    void insert(const char& value)
  38.    {
  39.         if(head == nullptr) // first case
  40.         {
  41.             Node *newNode = new Node(value);
  42.             newNode->next_node = head;
  43.             head = newNode;
  44.         }
  45.         else                                  // all new nodes
  46.         {
  47.             Node *temp = head;
  48.             while(temp->next_node != nullptr) // to find the null point (end of list)
  49.                 temp = temp->next_node;
  50.  
  51.             temp = temp->next_node = new Node(value);
  52.         }
  53.     }
  54.  
  55.     void print() const      // just to print
  56.     {
  57.         Node *temp = head;
  58.         while(temp != nullptr)
  59.         {
  60.             std::cout << temp->data << "\n";
  61.             temp = temp->next_node;
  62.         }
  63.     }
  64. };
  65. }
  66.  
  67. int main()
  68. {
  69.    mylib::list myList = {'a', 'b', 'c' , 'a' };
  70.  
  71.    myList.print();
  72.  
  73.    return 0;
  74. }
Success #stdin #stdout 0s 4404KB
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https://ideone.com/uU7Wjj
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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