按订单编号进行查询函数c++

以下是一个简单的C++函数，它可以按照订单编号查询订单：

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

using namespace std;

struct Order {
    string order_number;
    string customer_name;
    string product_name;
};

vector<Order> orders;

void search_order(string order_number) {
    bool found = false;
    for (int i = 0; i < orders.size(); i++) {
        if (orders[i].order_number == order_number) {
            cout << "Order Number: " << orders[i].order_number << endl;
            cout << "Customer Name: " << orders[i].customer_name << endl;
            cout << "Product Name: " << orders[i].product_name << endl;
            found = true;
            break;
        }
    }
    if (!found) {
        cout << "Order not found!" << endl;
    }
}

int main() {
    // add some sample orders
    orders.push_back({"1001", "John Smith", "iPhone 12"});
    orders.push_back({"1002", "Jane Doe", "Samsung Galaxy S21"});
    orders.push_back({"1003", "Bob Johnson", "Google Pixel 5"});

    // search for an order by order number
    string order_number;
    cout << "Enter order number to search: ";
    cin >> order_number;
    search_order(order_number);

    return 0;
}

该程序首先定义了一个表示订单的结构体 `Order`，其中包含订单号、客户姓名和产品名称。然后，它定义了一个 `vector`，用于存储所有订单。在 `main` 函数中，程序添加了一些示例订单，并然后提示用户输入要查询的订单号。最后，程序调用 `search_order` 函数来查找指定的订单，并显示订单的详细信息。如果订单不存在，则输出一条错误消息。