ISEbd-11_Evtishina_E.V./labalaba2/lab2/SourceZhadny.cpp

#include <string>
#include <iostream>
#include <vector>
class Item {
private:
	std::string name;
	int weight;
	int price;
public:

	int GetItemWeight() {
		return weight;
	}
	int GetItemPrice() {
		return price;
	}
	double GetPriceOfWeight() {
		return price / (double)weight;
	}
	void PrintParametres() {
		std::cout << "\tName item: " << name << "\n\t\tWeight: " << weight << "\n\t\tPrice:" << price << std::endl;
	}
	void SetParametresOfItem() {
		std::cout << "Enter name of item: ";
		std::cin >> name;
		std::cout << std::endl;
		std::cout << "Enter weight of item: ";
		std::cin >> weight;
		std::cout << std::endl;
		std::cout << "Enter price of item: ";
		std::cin >> price;
		std::cout << std::endl;
	}
};

class ItemsHeap {
private:
	bool sorted = false;
	std::vector <Item> itemsHeap;
	void m_swap(int i_1, int i_2) {
		Item tmp = itemsHeap[i_1];
		itemsHeap[i_1] = itemsHeap[i_2];
		itemsHeap[i_2] = tmp;
	}
	void sort_items() {
		int i_mx = 0;
		for (int i = 0; i < itemsHeap.size(); ++i) {
			i_mx = i;
			for (int j = i + 1; j < itemsHeap.size(); ++j) {
				if (itemsHeap[j].GetPriceOfWeight() > itemsHeap[i_mx].GetPriceOfWeight()) {
					i_mx = j;
				}
			}
			if (i != i_mx)
				m_swap(i, i_mx);
		}
	}
public:
	int GetSizeHeap() {
		return itemsHeap.size();
	}
	void AddItemInHeap() {
		Item newItem;
		newItem.SetParametresOfItem();
		itemsHeap.push_back(newItem);
	}
	Item getItem() {
		if (!sorted) {
			sort_items();
			sorted = true;
		}
		Item temp = itemsHeap[0];
		itemsHeap.erase(itemsHeap.begin());
		return temp;
	}
};

class Knapsack {
private:
	int max_weight;
	int weight = 0;
	int price = 0;
	ItemsHeap heap;
	std::vector <Item> items;
	void SumOfItems(Item temp) {
		price += temp.GetItemPrice();
	}
	void WeightOfItems(Item temp) {
		weight += temp.GetItemWeight();
	}
public:
	int GetSizeOfHeapOnFloor() {
		return heap.GetSizeHeap();
	}
	void SetMaxWeight() {
		std::cout << "Enter max weight: ";
		std::cin >> max_weight;
		std::cout << std::endl;
	}
	void PrintItems() {
		std::cout << "Items:\n";
		for (int i = 0; i < items.size(); ++i) {
			items[i].PrintParametres();
		}
	}
	void PrintParametresKnapsack() {
		std::cout << "Backpack parametres:\n" << "\tPrice: " << price << " " << "\n\tWeight: " << weight << " " << "\n\tMax weight: " << max_weight << std::endl;
		PrintItems();
	}
	void AddItemOnFloor() {
		heap.AddItemInHeap();
	}
	void AddItemInKnapsack() {
		while (heap.GetSizeHeap() > 0) {
			Item temp = heap.getItem();
			if (temp.GetItemWeight() + weight <= max_weight)
			{
				items.push_back(temp);
				SumOfItems(temp);
				WeightOfItems(temp);
			}
			else
				break;
		}
		std::cout << "Complete task" << std::endl;
	}
};

void main() {
	Knapsack backpack;
	backpack.SetMaxWeight();
	backpack.AddItemOnFloor();
	backpack.AddItemInKnapsack();
	backpack.PrintParametresKnapsack();
}