Init

Lab3.cpp

@@ -0,0 +1,275 @@
+#include <algorithm>
+#include <iomanip>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+
+using namespace std;
+
+struct ProductCategory
+{
+	string ID;
+	string name;
+	ProductCategory *next;
+};
+
+struct Product
+{
+	string ID;
+	string name;
+	int selling_price;
+	int importing_price;
+	double quantity;
+	ProductCategory *product_category;
+	Product *next;
+};
+
+void releaseCategory(ProductCategory* &category_head)
+{
+	if (category_head != NULL)
+	{
+		ProductCategory* temp = category_head;
+		category_head = category_head->next;
+		delete temp;
+		releaseCategory(category_head);
+	}
+}
+
+void releaseProduct(Product* &head)
+{
+	if (head != NULL)
+	{
+		Product* temp = head;
+		head = head->next;
+		delete temp;
+		releaseProduct(head);
+	}
+}
+
+void appendCategory(ProductCategory* &category_head, ProductCategory* newcategory)
+{
+	if (category_head == NULL)
+	{
+		category_head = newcategory;
+		return;
+	}
+	ProductCategory *temp = category_head;
+	while (temp->next != NULL) temp = temp->next;
+	temp->next = newcategory;
+}
+
+void appendProduct(Product* &head, Product* new_product)
+{
+	if (head == NULL)
+	{
+		head = new_product;
+		return;
+	}
+	Product *temp = head;
+	while (temp->next != NULL) temp = temp->next;
+	temp->next = new_product;
+}
+
+void findProductCategory(ProductCategory* category_head, string ID, ProductCategory* &result)
+{
+	result = category_head;
+	while (result != NULL)
+	{
+		if (result->ID == ID)
+			return;
+		result = result->next;
+	}
+}
+
+void readFromFile(string filename, Product* &head, ProductCategory* &category_head)
+{
+	releaseCategory(category_head);
+	releaseProduct(head);
+	ifstream ifs;
+	ifs.open(filename, ifstream::in);
+	if (!ifs.is_open())
+	{
+		cout << "Loi doc file!" << endl;
+		return;
+	}
+	string line;
+	while (getline(ifs, line))
+	{
+		replace(line.begin(), line.end(), ',', ' ');
+		Product *new_product = new Product;
+		string ID, name;
+		istringstream iss;
+		iss.str(line);
+		iss >> new_product->ID
+			>> new_product->name
+			>> new_product->selling_price
+			>> new_product->importing_price
+			>> new_product->quantity
+			>> ID
+			>> name;
+		new_product->next = NULL;
+		findProductCategory(category_head, ID, new_product->product_category);
+		if (new_product->product_category == NULL)
+		{
+			ProductCategory *new_category = new ProductCategory;
+			new_category->ID = ID;
+			new_category->name = name;
+			new_category->next = NULL;
+			appendCategory(category_head, new_category);
+			new_product->product_category = new_category;
+		}
+		appendProduct(head, new_product);
+	}
+	ifs.close();
+}
+
+void writeProductToFile(string filename, Product* head)
+{
+	ofstream ofs;
+	ofs.open(filename, ofstream::out);
+	Product* temp = head;
+	while (temp != NULL)
+	{
+		ofs << setprecision(10)
+			<< temp->ID << ","
+			<< temp->name << ","
+			<< temp->selling_price << ","
+			<< temp->importing_price << ","
+			<< temp->quantity << ","
+			<< temp->product_category->ID << ","
+			<< temp->product_category->name
+			<< endl;
+		temp = temp->next;
+	}
+	ofs.close();
+}
+
+void printAllCategories(Product* head)
+{
+	int cnt = 0;
+	ProductCategory *category_head = NULL;
+	Product *temp = head;
+	while (temp != NULL)
+	{
+		ProductCategory *result = NULL;
+		findProductCategory(category_head, temp->product_category->ID, result);
+		if (result == NULL)
+		{
+			result = new ProductCategory;
+			result->ID = temp->product_category->ID;
+			result->name = temp->product_category->name;
+			result->next = NULL;
+			appendCategory(category_head, result);
+			++cnt;
+		}
+		temp = temp->next;
+	}
+	cout << cnt;
+	if (cnt > 1) cout << " categories";
+	else cout << " category";
+	cout << endl;
+	ProductCategory *tmp = category_head;
+	while (tmp != NULL)
+	{
+		cout << "----------------" << endl;
+		cout << "ID: " << tmp->ID << endl;
+		cout << "Name: " << tmp->name << endl;
+		tmp = tmp->next;
+	}
+	releaseCategory(category_head);
+}
+
+bool deleteProducts(Product* &head, double quantity)
+{
+	int cnt = 0;
+	Product *temp, *tmp;
+	while (head != NULL)
+	{
+		if (head->quantity < quantity)
+		{
+			tmp = head;
+			head = head->next;
+			delete tmp;
+			++cnt;
+		}
+		else break;
+	}
+	if (head != NULL)
+	{
+		temp = head;
+		while (temp->next != NULL)
+		{
+			if (temp->next->quantity < quantity)
+			{
+				tmp = temp->next;
+				temp->next = tmp->next;
+				delete tmp;
+				++cnt;
+				continue;
+			}
+			temp = temp->next;
+		}
+	}
+	return (cnt > 0);
+}
+
+double sellingFromFile(Product* &head, string filename)
+{
+	ifstream ifs;
+	double price = 0;
+	ifs.open(filename, ios::in);
+	if (!ifs.is_open())
+	{
+		cout << "Loi doc file" << endl;
+		return price;
+	}
+	string line;
+	while (getline(ifs, line))
+	{
+		replace(line.begin(), line.end(), ',', ' ');
+		istringstream iss;
+		string ID;
+		double quantity;
+		iss.str(line);
+		iss >> ID >> quantity;
+		Product *temp = head;
+		while (temp != NULL)
+		{
+			if (temp->ID == ID)
+			{
+				if (temp->quantity > quantity)
+				{
+					price += quantity * temp->selling_price;
+					temp->quantity -= quantity;
+				}
+				else
+				{
+					price += temp->quantity * temp->selling_price;
+					temp->quantity = 0;
+				}
+				break;
+			}
+			temp = temp->next;
+		}
+	}
+	ifs.close();
+	return price;
+}
+
+int main()
+{
+	Product *head = NULL;
+	ProductCategory *category_head = NULL;
+	readFromFile("ProductIn.csv", head, category_head);
+	double m = sellingFromFile(head, "SellingProduct.csv");
+	cout << "Tong so tien: " << m << endl;
+	printAllCategories(head);
+	bool b = deleteProducts(head, 5);
+	if (b)
+		cout << "Delete thanh cong!" << endl;
+	else
+		cout << "Delete khong thanh cong!" << endl;
+	writeProductToFile("ProductOut.csv", head);
+	system("pause");
+	return 0;
+}