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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct Node {
  5. 	int data;
  6. 	Node* pNext;
  7. };
  8.  
  9. struct MyQueue {
  10.     Node* pHead = nullptr;
  11.     Node* pTail = nullptr;
  12.  
  13.     void enqueue(Node* pNew);
  14.     Node* dequeue();
  15. };
  16.  
  17. int main() {
  18.  
  19. 	// Declaration
  20. 	MyQueue mQueue;
  21.  
  22. 	// Enqueue operation
  23. 	{
  24. 		Node* mData = new Node;
  25. 		mData->data = 100000;
  26. 		mData->pNext = nullptr;
  27. 		mQueue.enqueue(mData);
  28. 	}
  29.  
  30. 	// Dequeue operation
  31. 	{
  32. 		Node* mData = mQueue.dequeue();
  33. 		cout<<mData->data;
  34. 	}
  35.  
  36. 	return 0;
  37. }
  38.  
  39. void MyQueue::enqueue(Node* pNew) {
  40.     if(!pHead) {
  41.         pHead = pNew;
  42.         pTail = pNew;
  43.         pHead->pNext = nullptr;
  44.     } else {
  45.         pTail->pNext = pNew;
  46.         pTail = pTail->pNext;
  47.     }
  48. }
  49.  
  50. Node* MyQueue::dequeue() {
  51.     if(!pHead) return nullptr;
  52.     Node* tmp = pHead;
  53.     pHead = pHead->pNext;
  54.     if(!pHead) pTail = nullptr;
  55.     return tmp;
  56. }
Success #stdin #stdout 0.01s 5544KB
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stdin
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Standard input is empty
stdout
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100000
https://ideone.com/EEtT3g
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
secret

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