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  1. #include <iostream>
  2.  
  3. class Item{
  4. private:
  5. 	int key;
  6. 	int data;
  7. public:
  8. 	Item(): data(0), key(0){}
  9. 	Item(int data, int key): data(data), key(key){}
  10. 	void print(){
  11. 		std::cout << "data: " << data << ", key " << key << std::endl;
  12. 	}
  13. 	bool operator <(const Item &item){ return key < item.key; }
  14. 	bool operator >(const Item &item){ return key > item.key; }
  15. };
  16.  
  17. template<class Item>
  18. class PQ{
  19. private:
  20. 	Item *pq;
  21. 	int n;
  22. public:
  23. 	PQ(int max){
  24. 		pq = new Item[max];
  25. 		n = 0;
  26. 	}
  27. 	int empty() const{ return n == 0; }
  28. 	void insert(Item item){
  29. 		pq[n++] = item;
  30. 	}
  31. 	Item getmax(){
  32. 		int max = 0;
  33.  
  34. 		for(int i = 1; i < n; i+)
  35. 			if(pq[max] < pq[i])
  36. 				max = i;
  37. 		std::swap(pq[max], pq[n-1]);
  38. 		return pq[--n];
  39. 	}
  40. 	void show(){
  41. 		for(int i = 0; i < n; i++)
  42. 			pq[i].print();
  43. 	}
  44. };
  45.  
  46. int main(){
  47. 	int p;
  48. 	Item item;
  49. 	PQ<Item> pq(50);
  50.  
  51. 	for(int i = 0; i < 10; i++)
  52. 		pq.insert(Item(7, i));
  53.  
  54. 	pq.show();
  55.  
  56. 	std::cout << "max:\n";
  57. 	item = pq.getmax();
  58.  
  59. 	std::cin >> p;
  60. 	return 0;
  61. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp: In member function 'Item PQ<Item>::getmax()':
prog.cpp:34:27: error: expected primary-expression before ')' token
   for(int i = 1; i < n; i+)
                           ^
stdout
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Standard output is empty
https://ideone.com/thYStx
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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