Minihomework3 (Sobolev Fedor)

sem1/Fedor Sobolev/MIni Homework №3/MInitask3.cpp

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+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <vector>
+#include <memory>
+
+//Базовый класс для предметов
+class ItemBase {
+public:
+    virtual ~ItemBase() = default;
+    virtual double getPrice() const = 0;
+    virtual double getWeight() const = 0;
+};
+
+//Общий класс Item
+class Item : public ItemBase {
+protected:
+    std::string name;
+    double price;
+    double weight;
+
+public:
+    Item(const std::string& name, double price, double weight)
+        : name(name), price(price), weight(weight) {}
+
+    double getPrice() const override { return price; }
+    double getWeight() const override { return weight; }
+
+    std::string getName() const { return name; }
+};
+
+//Класс для "ForPCs"
+class ForPCsItem : public Item {
+    std::string spec;
+    int performance;
+
+public:
+    ForPCsItem(const std::string& name, double price, double weight, const std::string& spec, int performance)
+        : Item(name, price, weight), spec(spec), performance(performance) {}
+};
+
+//Класс для Fruits"
+class FruitItem : public Item {
+    std::vector<std::string> vitamins;
+
+public:
+    FruitItem(const std::string& name, double price, double weight, const std::vector<std::string>& vitamins)
+        : Item(name, price, weight), vitamins(vitamins) {}
+};
+
+//Класс для "Books"
+class BookItem : public Item {
+    std::string genre;
+    std::string category;
+
+public:
+    BookItem(const std::string& name, double price, double weight, const std::string& genre, const std::string& category)
+        : Item(name, price, weight), genre(genre), category(category) {}
+};
+
+//Класс для магазина, который содержит предметы
+class Shop {
+    std::string name;
+    std::vector<std::shared_ptr<ItemBase>> items;
+
+public:
+    Shop(const std::string& name) : name(name) {}
+
+    void addItem(const std::shared_ptr<ItemBase>& item) {
+        items.push_back(item);
+    }
+
+    double averagePrice() const {
+        double total = 0;
+        for (const auto& item : items) {
+            total += item->getPrice();
+        }
+        return items.empty() ? 0 : total / items.size();
+    }
+
+    double averageWeight() const {
+        double total = 0;
+        for (const auto& item : items) {
+            total += item->getWeight();
+        }
+        return items.empty() ? 0 : total / items.size();
+    }
+
+    void printShopInfo() const {
+        std::cout << "Shop: " << name << "\n"
+                  << "Average Price: " << averagePrice() << "\n"
+                  << "Average Weight: " << averageWeight() << "\n\n";
+    }
+};
+
+//Функция для парсинга данных из файла
+std::vector<Shop> parseFile(const std::string& filename) {
+    std::ifstream file(filename);
+    std::vector<Shop> shops;
+    std::string line;
+
+    while (std::getline(file, line)) {
+        if (line.rfind("Shop", 0) == 0) {
+            std::string shopName = line.substr(5);
+            Shop shop(shopName);
+
+            std::getline(file, line);
+            int itemCount = std::stoi(line.substr(6));
+
+            for (int i = 0; i < itemCount; ++i) {
+                std::getline(file, line);
+                std::istringstream itemStream(line);
+                std::string name;
+                double price, weight;
+                std::string attribute1, attribute2;
+
+                itemStream >> name >> price >> weight >> attribute1 >> attribute2;
+
+                if (shopName == "ForPCs") {
+                    int performance = std::stoi(attribute2);
+                    shop.addItem(std::make_shared<ForPCsItem>(name, price, weight, attribute1, performance));
+                } else if (shopName == "Fruits") {
+                    std::vector<std::string> vitamins;
+                    vitamins.push_back(attribute1);
+                    while (itemStream >> attribute2) {
+                        vitamins.push_back(attribute2);
+                    }
+                    shop.addItem(std::make_shared<FruitItem>(name, price, weight, vitamins));
+                } else if (shopName == "Books") {
+                    shop.addItem(std::make_shared<BookItem>(name, price, weight, attribute1, attribute2));
+                }
+            }
+
+            shops.push_back(shop);
+        }
+    }
+    return shops;
+}
+
+int main() {
+    std::vector<Shop> shops = parseFile("shops.txt");
+
+    for (const auto& shop : shops) {
+        shop.printShopInfo();
+    }
+
+    return 0;
+}

sem1/Fedor Sobolev/MIni Homework №3/shops.txt

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+Shop ForPCs
+Items 5
+NVIDIA10090 100000 1000 FPS 1
+NVIDIA9090 99999 999 FPS 2
+IntelCoreI99 50000 1 CPU 550
+AMDThreadripper 7 3 CPU 770
+ASUSROGMonitor 333 10 Monitor 333
+
+Shop Fruits
+Items 5
+Banana 1 1 Vitamins Ka Ca
+Apple 2 1 Vitamins A C
+Orange 1.5 1 Vitamins C
+Grapes 2.5 0.5 Vitamins A C E
+Pineapple 3 2 Vitamins B C
+
+Shop Books
+Items 5
+CrimeaAndPunishment 15 0.5 Literature Classic
+WarAndPeace 20 1 Literature Classic
+MobyDick 10 1 Literature Adventure
+CatchMeIfYouCan 12 0.8 Literature Classic
+HarryPotter 25 1.2 Fantasy Adventure