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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. #include <iostream>
  5.  
  6. class LinkedList{
  7.     // Struct inside the class LinkedList
  8.     // This is one node which is not needed by the caller. It is just
  9.     // for internal work.
  10.     struct Node {
  11.         int x;
  12.         Node *next;
  13.     };
  14.  
  15. // public member
  16. public:
  17.     // constructor
  18.     /* constexpr */ LinkedList() : head(nullptr) {
  19.     }
  20.  
  21.     // This prepends a new value at the beginning of the list
  22.     void addValue(int val){
  23.         Node *n = new Node();   // create new Node
  24.         n->x = val;             // set value
  25.         n->next = head;         // make the node point to the next node.
  26.                                 //  If the list is empty, this is NULL, so the end of the list --> OK
  27.         head = n;               // last but not least, make the head point at the new node.
  28.     }
  29.  
  30.     // returns the first element in the list and deletes the Node.
  31.     // caution, no error-checking here!
  32.     int popValue(){
  33.         Node *n = head;
  34.         int ret = n->x;
  35.  
  36.         head = head->next;
  37.         delete n;
  38.         return ret;
  39.     }
  40.  
  41. // private member
  42. private:
  43.     Node *head; // this is the private member variable. It is just a pointer to the first Node
  44. };
  45.  
  46. extern LinkedList list;
  47.  
  48. int my_crazy_variable = ([]{ list.addValue(10); return 0; })();
  49. LinkedList list;
  50.  
  51. int main() {
  52.     using namespace std;
  53. 	cout << my_crazy_variable << endl;
  54. 	cout << list.popValue() << endl; 
  55.     return 0;
  56. }
Runtime error #stdin #stdout 0s 3456KB
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https://ideone.com/O5YWM8
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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