用c++写一个跑腿小程序

在C++中编写一个简单的跑腿小程序，可以设计成命令行交互的程序，用于接收用户的请求并进行处理。这里我会提供一个基本的框架示例，假设我们有一个名为`TaskRunner`的类，它有添加任务（`addTask`）、查看任务列表（`viewTasks`）和完成任务（`completeTask`）等功能。

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

class Task {
public:
    std::string description;
    bool completed;

    // 构造函数
    Task(const std::string& desc) : description(desc), completed(false) {}
};

class TaskRunner {
private:
    std::vector<Task> tasks;

public:
    void addTask(const std::string& taskDesc) {
        Task newTask(taskDesc);
        tasks.push_back(newTask);
        std::cout << "Task added: " << taskDesc << "\n";
    }

    void viewTasks() const {
        if (tasks.empty()) {
            std::cout << "No tasks available.\n";
        } else {
            for (const auto& task : tasks) {
                std::cout << "ID: " << int(tasks.size() - 1) + 1 << ", Task: " << task.description << ", Completed: " << (task.completed ? "Yes" : "No") << "\n";
            }
        }
    }

    void completeTask(int taskId) {
        if (taskId >= 0 && taskId < tasks.size()) {
            tasks[taskId].completed = true;
            std::cout << "Task completed: " << tasks[taskId].description << "\n";
        } else {
            std::cout << "Invalid task ID.\n";
        }
    }
};

int main() {
    TaskRunner runner;
    
    while (true) {
        std::cout << "Select an option:\n"
                  << "1. Add a task\n"
                  << "2. View tasks\n"
                  << "3. Complete a task\n"
                  << "4. Exit\n"
                  << "Enter your choice: ";
        int choice;
        std::cin >> choice;

        switch (choice) {
            case 1:
                std::string taskDesc;
                std::cout << "Enter task description: ";
                std::getline(std::cin, taskDesc);
                runner.addTask(taskDesc);
                break;
            case 2:
                runner.viewTasks();
                break;
            case 3:
                int taskId;
                std::cout << "Enter task ID to complete: ";
                std::cin >> taskId;
                runner.completeTask(taskId);
                break;
            case 4:
                std::cout << "Exiting...\n";
                return 0;
            default:
                std::cout << "Invalid choice. Please try again.\n";
                break;
        }
    }
}

这个例子是一个基础版本，实际应用可能会需要更复杂的错误处理、用户界面以及持久化数据存储。运行这个程序后，用户可以通过输入相应的数字选择操作，如添加新任务、查看任务列表等。