超市管理系统C++

超市管理系统是一个非常复杂的软件系统，需要考虑多种因素，包括库存管理、销售统计、会员管理、收银管理等。以下是一个简单的超市管理系统的C++代码示例，仅供参考：

#include <iostream>
#include <string>
#include <vector>

using namespace std;

class Product {
private:
    string name;
    double price;
    int count;
public:
    Product(string n, double p, int c) {
        name = n;
        price = p;
        count = c;
    }

    string getName() {
        return name;
    }

    double getPrice() {
        return price;
    }

    int getCount() {
        return count;
    }

    void setCount(int c) {
        count = c;
    }

    void print() {
        cout << name << "\t" << price << "\t" << count << endl;
    }
};

class Cart {
private:
    vector<Product> products;
public:
    void add(Product p) {
        products.push_back(p);
    }

    double getTotalPrice() {
        double total = 0;
        for (int i = 0; i < products.size(); i++) {
            total += products[i].getPrice();
        }
        return total;
    }

    void print() {
        for (int i = 0; i < products.size(); i++) {
            products[i].print();
        }
        cout << "Total: " << getTotalPrice() << endl;
    }
};

class Inventory {
private:
    vector<Product> products;
public:
    void add(Product p) {
        products.push_back(p);
    }

    void print() {
        for (int i = 0; i < products.size(); i++) {
            products[i].print();
        }
    }

    Product find(string name) {
        for (int i = 0; i < products.size(); i++) {
            if (products[i].getName() == name) {
                return products[i];
            }
        }
        return Product("", 0, 0);
    }

    void update(string name, int count) {
        for (int i = 0; i < products.size(); i++) {
            if (products[i].getName() == name) {
                products[i].setCount(count);
                break;
            }
        }
    }
};

class Sale {
private:
    Cart cart;
    double discount;
public:
    Sale(Cart c, double d) {
        cart = c;
        discount = d;
    }

    double getTotalPrice() {
        return cart.getTotalPrice() * (1 - discount);
    }

    void print() {
        cart.print();
        cout << "Discount: " << discount << endl;
        cout << "Total: " << getTotalPrice() << endl;
    }
};

class Member {
private:
    string name;
    double balance;
    double discount;
public:
    Member(string n, double b, double d) {
        name = n;
        balance = b;
        discount = d;
    }

    string getName() {
        return name;
    }

    double getBalance() {
        return balance;
    }

    double getDiscount() {
        return discount;
    }

    void setBalance(double b) {
        balance = b;
    }
};

class Membership {
private:
    vector<Member> members;
public:
    void add(Member m) {
        members.push_back(m);
    }

    Member find(string name) {
        for (int i = 0; i < members.size(); i++) {
            if (members[i].getName() == name) {
                return members[i];
            }
        }
        return Member("", 0, 0);
    }

    void updateBalance(string name, double amount) {
        for (int i = 0; i < members.size(); i++) {
            if (members[i].getName() == name) {
                members[i].setBalance(members[i].getBalance() + amount);
                break;
            }
        }
    }
};

int main() {
    Inventory inventory;
    inventory.add(Product("Apple", 1.0, 10));
    inventory.add(Product("Banana", 2.0, 20));
    inventory.add(Product("Orange", 3.0, 30));

    Membership membership;
    membership.add(Member("John", 0, 0.1));
    membership.add(Member("Mary", 100, 0.2));

    Cart cart;
    cart.add(inventory.find("Apple"));
    cart.add(inventory.find("Banana"));

    double discount = 0;
    string name;
    cout << "Are you a member? (Y/N) ";
    char answer;
    cin >> answer;
    if (answer == 'Y' || answer == 'y') {
        cout << "Please enter your name: ";
        cin >> name;
        Member member = membership.find(name);
        if (member.getName() == "") {
            cout << "Member not found." << endl;
        } else {
            cout << "Welcome, " << member.getName() << "." << endl;
            discount = member.getDiscount();
            double balance = member.getBalance();
            if (balance > 0) {
                cout << "You have a balance of " << balance << "." << endl;
                cout << "Do you want to use it to pay for this purchase? (Y/N) ";
                char answer;
                cin >> answer;
                if (answer == 'Y' || answer == 'y') {
                    if (balance >= cart.getTotalPrice()) {
                        cout << "Payment successful." << endl;
                        membership.updateBalance(name, -cart.getTotalPrice());
                        return 0;
                    } else {
                        cout << "Insufficient balance." << endl;
                    }
                }
            }
        }
    }

    Sale sale(cart, discount);
    sale.print();

    cout << "Enter the amount paid: ";
    double paid;
    cin >> paid;
    if (paid >= sale.getTotalPrice()) {
        cout << "Change: " << paid - sale.getTotalPrice() << endl;
        if (name != "") {
            membership.updateBalance(name, sale.getTotalPrice() * (1 - discount));
        }
        for (int i = 0; i < cart.getCount(); i++) {
            Product product = cart.getProduct(i);
            inventory.update(product.getName(), product.getCount() - 1);
        }
    } else {
        cout << "Insufficient payment." << endl;
    }

    return 0;
}

注意，这只是一个简单的示例，实际的超市管理系统需要更复杂的功能和更完善的界面设计。