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  1. #include <iostream>
  2. //#include <cstdlib>
  3. #include <stdlib.h>
  4.  
  5. class Node {
  6. private:
  7.   int data;
  8.   Node *left, *right;
  9. public:
  10.   static Node *push(Node *root, int data) {
  11.     Node *p;
  12.     if (!root) {
  13.       p = new Node();
  14.       p->data = data;
  15.       p->left = p->right = 0;
  16.       return p;
  17.     } 
  18.     if (data < root->data) {
  19.       root->left = push(root->left, data);
  20.       return root;
  21.     } else {
  22.       root->right = push(root->right, data);
  23.       return root;
  24.     }
  25.   }
  26.   static Node *pop(Node *root, int &data) {
  27.     Node *p;
  28.     if (root == 0)
  29.       return 0;
  30.     if (root->left) {
  31.       root->left = pop(root->left, data);
  32.       return root;
  33.     }
  34.     p = root->right;
  35.     data = root->data;
  36.     delete root;
  37.     return p;
  38.   }
  39. };
  40.  
  41. class BinTree {
  42. private:
  43.   Node *root;
  44.   bool flag;
  45. public:
  46.   BinTree() {
  47.     root = 0;
  48.     flag = false;
  49.   }
  50.   void pushNode(int data) {
  51.     root = Node::push(root, data);
  52.     flag = true;
  53.   }
  54.   bool popNode(int &data) {
  55.     root = Node::pop(root, data);
  56.     if (!root) {
  57.       if (flag) {
  58.         flag = false;
  59.         return true;
  60.       } else
  61.         return false;
  62.     } else
  63.       return true;
  64.   }
  65. };
  66.  
  67. int main() {
  68.   const int n = 10;
  69.   const int max = 1000;
  70.   const int seed = 31415926;
  71.   int data;
  72.   BinTree *obj = new BinTree();
  73.   srand(seed);
  74.   for (int i = 0; i < n; i++) {
  75.     data = rand() % max;
  76.     obj->pushNode(data);
  77.   }
  78.   std::cout << "C++(1)" << std::endl;
  79.   while (obj->popNode(data))
  80.     std::cout << data << std::endl;
  81.   delete obj;
  82.   return 0;
  83. }
  84. /* end */
  85.  
Success #stdin #stdout 0.01s 2860KB
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C++(1)
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https://ideone.com/Y7HEx
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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