以下是一个简单的C++仓库库存管理系统的实现思路：

1. 首先，定义一个商品结构体，包含商品ID、商品名称、库存量等信息。

struct Product {
    int id;
    string name;
    int stock;
};

2. 创建一个仓库类，用于存储商品和进行库存操作。

class Warehouse {
public:
    Warehouse() {
        products.clear();
    }

    void addProduct(int id, string name, int stock) {
        products.push_back(Product{id, name, stock});
    }

    void updateProduct(int id, int newStock) {
        for (auto it = products.begin(); it != products.end(); ++it) {
            if (it->id == id) {
                it->stock = newStock;
                break;
            }
        }
    }

    void removeProduct(int id) {
        for (auto it = products.begin(); it != products.end(); ++it) {
            if (it->id == id) {
                products.erase(it);
                break;
            }
        }
    }

    int findProductStock(int id) {
        for (auto &product : products) {
            if (product.id == id) {
                return product.stock;
            }
        }
        return 0;
    }

    void displayAllProducts() {
        for (const auto &product : products) {
            cout << "ID: " << product.id << ", Name: " << product.name << ", Stock: " << product.stock << endl;
        }
    }

private:
    vector<Product> products;
};

3. 创建一个用户界面，用于接收用户的操作输入，并调用仓库类的相应方法进行处理。

int main() {
    Warehouse warehouse;
    int choice;

    while (true) {
        cout << "1. Add product" << endl;
        cout << "2. Update product" << endl;
        cout << "3. Remove product" << endl;
        cout << "4. Query product stock" << endl;
        cout << "5. Display all products" << endl;
        cout << "6. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice;

        switch (choice) {
            case 1: {
                int id, stock;
                string name;
                cout << "Enter product ID, name, and stock: ";
                cin >> id >> name >> stock;
                warehouse.addProduct(id, name, stock);
                break;
            }
            case 2: {
                int id, newStock;
                cout << "Enter product ID and new stock: ";
                cin >> id >> newStock;
                warehouse.updateProduct(id, newStock);
                break;
            }
            case 3: {
                int id;
                cout << "Enter product ID to remove: ";
                cin >> id;
                warehouse.removeProduct(id);
                break;
            }
            case 4: {
                int id;
                cout << "Enter product ID to query: ";
                cin >> id;
                cout << "Stock: " << warehouse.findProductStock(id) << endl;
                break;
            }
            case 5:
                warehouse.displayAllProducts();
                break;
            case 6:
                return 0;
            default:
                cout << "Invalid choice, please try again." << endl;
        }
    }

    return 0;
}

上述代码只是一个简单的实现示例，您可以根据需求进行扩展和优化。例如，可以添加日志记录功能，保存用户的操作记录；还可以使用数据库存储仓库数据，以便在程序启动时加载现有的库存信息。