How to write a simple logistics management system using C++?

How to use C to write a simple logistics management system?

Introduction:
Logistics management system is a very important part of the modern logistics industry. It can help companies efficiently manage transportation, warehousing, distribution and other logistics links. This article will introduce how to use C to write a simple logistics management system, help readers understand the basic syntax and object-oriented programming ideas of C, and practice some actual business logic. By studying this article, readers will be able to write a simple but fully functional logistics management system by themselves.

1. Requirements Analysis
Before starting to write the logistics management system, we first need to conduct a requirements analysis to clarify the functions and characteristics that the system should have. The following are the main functional points of the logistics management system:

1. Administrator functions
2. Log in to the system
3. Manage user information, including adding, deleting, modifying and checking users
4. Manage product information, including adding, deleting, modifying and checking products
5. View order information
6. User functions
7. Log in to the system
8. Place an order
9. Query order
10. Check logistics tracking status

2. System design
Before proceeding with system design, we need to clarify the basic architecture of the system. In this system, we will use object-oriented programming ideas to divide the system into the following categories:

1. User class: used to store and manage user information, including user names, passwords, etc. .
2. Item class: used to store and manage product information, including product name, price, etc.
3. Order class: used to store and manage order information, including order number, user information, product information, etc.
4. Logistics class: used to store and manage logistics tracking information, including order information, logistics status, etc.
5. System class: used to manage the main functions of the system, including user login, order management, logistics management, etc.

3. Code Implementation
Before code implementation, we first need to create a project in C, then create the header file and source file of the above class, and implement the corresponding member functions and Member variables. The following is a simple code example that shows how to use C to implement some basic functions of the above class:

// User.h
class User {
private:
    std::string username;
    std::string password;
public:
    User(std::string username, std::string password);
    std::string getUsername();
    std::string getPassword();
};

// Item.h
class Item {
private:
    std::string itemName;
    double weight;
public:
    Item(std::string itemName, double weight);
    std::string getItemName();
    double getWeight();
};

// Order.h
class Order {
private:
    std::string orderNumber;
    User user;
    Item item;
public:
    Order(std::string orderNumber, User user, Item item);
    std::string getOrderNumber();
    User getUser();
    Item getItem();
};

// Logistics.h
class Logistics {
private:
    Order order;
    std::string status;
public:
    Logistics(Order order, std::string status);
    Order getOrder();
    std::string getStatus();
};

// System.h
class System {
private:
    std::vector<User> users;
    std::vector<Item> items;
    std::vector<Order> orders;
    std::vector<Logistics> logistics;
public:
    void addUser(User user);
    void deleteUser(User user);
    void updateUser(User user);
    void addOrder(Order order);
    void deleteOrder(Order order);
    void updateOrder(Order order);
    void addLogistics(Logistics logistics);
    void deleteLogistics(Logistics logistics);
    void updateLogistics(Logistics logistics);
    void login(std::string username, std::string password);
    // 其他功能函数...
};

The above is just a simple example. In actual development, persistent storage of data, exception handling, etc. also need to be considered. situation, but will not be expanded upon here.

4. Operation and debugging
After we complete the code implementation, we need to conduct system testing and debugging. You can first compile and run the code, and perform some simple operations through the user interface to confirm whether the program can run normally. During the debugging process, you can use the debugger to step through the program, find the problem, and fix it.

5. Summary
This article introduces how to use C to write a simple logistics management system. Through this example, readers can understand the basic syntax of C and object-oriented programming ideas, as well as methods of applying this knowledge in actual projects. I hope this article can be helpful to readers and inspire them to continue to learn and practice in depth.

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