解释一下这段代码里的continue的含义if (sizeof(Key) < 8) { cout << "密码长度不够，请重新设置："; cin >> Key; if (sizeof(Key) < 8) continue; else break; }

在这段代码中，如果输入的密码长度小于8个字符，程序会输出一条提示信息，让用户重新输入密码。然后使用`continue`关键字跳过本次循环的剩余代码，重新开始下一次循环，直到输入的密码长度大于等于8个字符为止。如果输入的密码长度大于等于8个字符，则使用`break`关键字结束循环，程序继续执行后面的代码。`continue`和`break`都是循环控制语句，`continue`用于跳过本次循环的剩余代码，重新开始下一次循环，而`break`用于结束当前循环。

相关问题

#include <Winsock2.h> #include <Windows.h> #include <iostream> #include <fstream> #include <string> #include <sstream> #include <vector> #include <map> #pragma comment(lib, "ws2_32.lib") std::map<std::string, std::string> readIniFile(std::string fileName) { std::map<std::string, std::string> configMap; std::ifstream file(fileName); if (file.is_open()) { std::string line; std::string section = ""; while (getline(file, line)) { if (line.empty()) { continue; } if (line[0] == '[' && line[line.length() - 1] == ']') { section = line.substr(1, line.length() - 2); } else { std::stringstream ss(line); std::string key, value; getline(ss, key, '='); getline(ss, value); configMap[section + "." + key] = value; } } file.close(); } return configMap; } void writeLogFile(std::string fileName, std::string logText) { std::ofstream file(fileName, std::ios_base::app); if (file.is_open()) { file << logText << std::endl; file.close(); } } int main() { std::map<std::string, std::string> config = readIniFile("config.ini"); int bluetoothCount = std::stoi(config["bluetooth.count"]); std::string logFileName = config["log.filename"]; WSADATA wsaData; int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData); if (iResult != 0) { std::cout << "WSAStartup failed: " << iResult << std::endl; return 1; } WSAQUERYSET service; memset(&service, 0, sizeof(service)); service.dwSize = sizeof(service); service.dwNameSpace = NS_BTH; HANDLE lookupHandle = NULL; iResult = WSALookupServiceBegin(&service, LUP_CONTAINERS, &lookupHandle); if (iResult != 0) { std::cout << "WSALookupServiceBegin failed: " << iResult << std::endl; WSACleanup(); return 1; } int count = 0; WSAQUERYSET* pResult = (WSAQUERYSET*)LocalAlloc(LPTR, sizeof(WSAQUERYSET)); while (count < bluetoothCount) { DWORD dwSize = sizeof(WSAQUERYSET); iResult = WSALookupServiceNext(lookupHandle, LUP_RETURN_NAME | LUP_RETURN_ADDR, &dwSize, pResult); if (iResult != 0) { break; } count++; } LocalFree(pResult); WSALookupServiceEnd(lookupHandle); WSACleanup(); if (count >= bluetoothCount) { std::string logText = "Bluetooth count is " + std::to_string(count) + ", reached the target count of " + std::to_string(bluetoothCount); writeLogFile(logFileName, logText); } else { std::string logText = "Bluetooth count is " + std::to_string(count) + ", did not reach the target count of " + std::to_string(bluetoothCount); writeLogFile(logFileName, logText); } return 0; } 给这段代码搜索蓝牙设备加上搜索时间

可以在搜索蓝牙设备的while循环中添加一个计时器，当计时器达到设定的搜索时间时，跳出循环。

例如，在main函数中添加一个变量searchTime，表示搜索蓝牙设备的最大时间，单位为秒。然后在while循环中添加一个计时器，每次循环结束将已经搜索的时间加上循环间隔（例如1秒），如果搜索时间超过了searchTime，就跳出循环。

修改后的代码如下：

int main() {
std::map<std::string, std::string> config = readIniFile("config.ini");
int bluetoothCount = std::stoi(config["bluetooth.count"]);
std::string logFileName = config["log.filename"];
int searchTime = std::stoi(config["bluetooth.searchtime"]); // 添加搜索时间配置项
WSADATA wsaData;
int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
std::cout << "WSAStartup failed: " << iResult << std::endl;
return 1;
}
WSAQUERYSET service;
memset(&service, 0, sizeof(service));
service.dwSize = sizeof(service);
service.dwNameSpace = NS_BTH;
HANDLE lookupHandle = NULL;
iResult = WSALookupServiceBegin(&service, LUP_CONTAINERS, &lookupHandle);
if (iResult != 0) {
std::cout << "WSALookupServiceBegin failed: " << iResult << std::endl;
WSACleanup();
return 1;
}
int count = 0;
WSAQUERYSET* pResult = (WSAQUERYSET*)LocalAlloc(LPTR, sizeof(WSAQUERYSET));
int searchCount = 0; // 添加搜索计数器
while (searchCount < searchTime) { // 添加计时器
DWORD dwSize = sizeof(WSAQUERYSET);
iResult = WSALookupServiceNext(lookupHandle, LUP_RETURN_NAME | LUP_RETURN_ADDR, &dwSize, pResult);
if (iResult != 0) {
break;
}
count++;
searchCount++; // 每次循环增加已搜索时间
Sleep(1000); // 等待1秒，再进行下一次搜索
if (searchCount >= searchTime) { // 如果已经搜索了设定的时间，跳出循环
break;
}
}
LocalFree(pResult);
WSALookupServiceEnd(lookupHandle);
WSACleanup();
if (count >= bluetoothCount) {
std::string logText = "Bluetooth count is " + std::to_string(count) + ", reached the target count of " + std::to_string(bluetoothCount);
writeLogFile(logFileName, logText);
}
else {
std::string logText = "Bluetooth count is " + std::to_string(count) + ", did not reach the target count of " + std::to_string(bluetoothCount);
writeLogFile(logFileName, logText);
}
return 0;
}

请写出符合5.14.2qt版本的代码，符合五子棋规则，能悔棋，用c++

### 回答1：
以下是符合5.14.2qt版本的代码，实现五子棋规则和悔棋功能：

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QPushButton>
#include <QLabel>
#include <QGridLayout>
#include <QMessageBox>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void buttonClicked();
    void undoClicked();

private:
    QPushButton *buttons[15][15];
    QPushButton *undoButton;
    QLabel *messageLabel;
    QGridLayout *gridLayout;
    int chessboard[15][15];
    int currentPlayer;
    bool gameOver;
    int steps;
    int history[225][3];

    void initUI();
    void initChessboard();
    bool checkWin(int row, int col);
    bool checkHorizontal(int row, int col);
    bool checkVertical(int row, int col);
    bool checkDiagonal1(int row, int col);
    bool checkDiagonal2(int row, int col);
    void showMessage(QString message);
    void updateChessboard(int row, int col);
    void undoChessboard();
};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    initUI();
    initChessboard();
}

MainWindow::~MainWindow()
{
}

void MainWindow::initUI()
{
    QWidget *centralWidget = new QWidget(this);
    setCentralWidget(centralWidget);

    gridLayout = new QGridLayout(centralWidget);
    gridLayout->setSpacing(0);

    for (int i = 0; i < 15; i++) {
        for (int j = 0; j < 15; j++) {
            buttons[i][j] = new QPushButton(centralWidget);
            buttons[i][j]->setFixedSize(40, 40);
            buttons[i][j]->setProperty("row", i);
            buttons[i][j]->setProperty("col", j);
            gridLayout->addWidget(buttons[i][j], i, j);
            connect(buttons[i][j], SIGNAL(clicked()), this, SLOT(buttonClicked()));
        }
    }

    undoButton = new QPushButton(tr("悔棋"), centralWidget);
    undoButton->setFixedSize(80, 40);
    connect(undoButton, SIGNAL(clicked()), this, SLOT(undoClicked()));
    gridLayout->addWidget(undoButton, 15, 0, 1, 2);

    messageLabel = new QLabel(centralWidget);
    messageLabel->setFixedSize(150, 40);
    gridLayout->addWidget(messageLabel, 15, 2, 1, 13, Qt::AlignLeft | Qt::AlignVCenter);

    setFixedSize(620, 620);
    setWindowTitle(tr("五子棋"));
}

void MainWindow::initChessboard()
{
    for (int i = 0; i < 15; i++) {
        for (int j = 0; j < 15; j++) {
            chessboard[i][j] = 0;
        }
    }

    currentPlayer = 1;
    gameOver = false;
    steps = 0;
    memset(history, 0, sizeof(history));
    showMessage(tr("黑方先手"));
}

bool MainWindow::checkWin(int row, int col)
{
    if (checkHorizontal(row, col) || checkVertical(row, col) ||
        checkDiagonal1(row, col) || checkDiagonal2(row, col)) {
        return true;
    }
    return false;
}

bool MainWindow::checkHorizontal(int row, int col)
{
    int count = 1;
    for (int i = col - 1; i >= 0; i--) {
        if (chessboard[row][i] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    for (int i = col + 1; i < 15; i++) {
        if (chessboard[row][i] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    if (count >= 5) {
        return true;
    }
    return false;
}

bool MainWindow::checkVertical(int row, int col)
{
    int count = 1;
    for (int i = row - 1; i >= 0; i--) {
        if (chessboard[i][col] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    for (int i = row + 1; i < 15; i++) {
        if (chessboard[i][col] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    if (count >= 5) {
        return true;
    }
    return false;
}

bool MainWindow::checkDiagonal1(int row, int col)
{
    int count = 1;
    for (int i = row - 1, j = col - 1; i >= 0 && j >= 0; i--, j--) {
        if (chessboard[i][j] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    for (int i = row + 1, j = col + 1; i < 15 && j < 15; i++, j++) {
        if (chessboard[i][j] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    if (count >= 5) {
        return true;
    }
    return false;
}

bool MainWindow::checkDiagonal2(int row, int col)
{
    int count = 1;
    for (int i = row - 1, j = col + 1; i >= 0 && j < 15; i--, j++) {
        if (chessboard[i][j] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    for (int i = row + 1, j = col - 1; i < 15 && j >= 0; i++, j--) {
        if (chessboard[i][j] == chessboard[row][col]) {
            count++;
        } else {
            break;
        }
    }
    if (count >= 5) {
        return true;
    }
    return false;
}

void MainWindow::showMessage(QString message)
{
    messageLabel->setText(message);
}

void MainWindow::updateChessboard(int row, int col)
{
    buttons[row][col]->setIcon(currentPlayer == 1 ? QIcon(":/black.png") : QIcon(":/white.png"));
    chessboard[row][col] = currentPlayer;
    history[steps][0] = row;
    history[steps][1] = col;
    history[steps][2] = currentPlayer;
    steps++;
    if (checkWin(row, col)) {
        gameOver = true;
        QString message = QString("恭喜%1方获胜！").arg(currentPlayer == 1 ? "黑" : "白");
        showMessage(message);
        QMessageBox::information(this, "游戏结束", message);
    } else if (steps == 15 * 15) {
        gameOver = true;
        showMessage("平局");
        QMessageBox::information(this, "游戏结束", "平局");
    } else {
        currentPlayer = currentPlayer == 1 ? 2 : 1;
        QString message = QString("%1方落子").arg(currentPlayer == 1 ? "黑" : "白");
        showMessage(message);
    }
}

void MainWindow::undoChessboard()
{
    if (steps > 0) {
        steps--;
        int row = history[steps][0];
        int col = history[steps][1];
        int player = history[steps][2];
        buttons[row][col]->setIcon(QIcon());
        chessboard[row][col] = 0;
        currentPlayer = player;
        QString message = QString("%1方悔棋").arg(currentPlayer == 1 ? "黑" : "白");
        showMessage(message);
    }
}

void MainWindow::buttonClicked()
{
    if (gameOver) {
        return;
    }

    QPushButton *button = qobject_cast<QPushButton *>(sender());
    int row = button->property("row").toInt();
    int col = button->property("col").toInt();
    if (chessboard[row][col] == 0) {
        updateChessboard(row, col);
    }
}

void MainWindow::undoClicked()
{
    if (gameOver) {
        return;
    }

    undoChessboard();
}

注意：在工程的资源文件 (.qrc) 中需要添加黑棋图标（black.png）和白棋图标（white.png）。

### 回答2：
下面是一个简单的五子棋游戏实现的C代码，基于Qt 5.14.2版本。该程序可以进行双人对战，满足五子棋的规则，并且支持悔棋操作。

#include <QCoreApplication>
#include <iostream>
#include <vector>

const int SIZE = 15;  // 棋盘大小

enum class Player { BLACK, WHITE };
enum class Chess { NONE, BLACK, WHITE };

class Game {
public:
    Game() {
        board.resize(SIZE, std::vector<Chess>(SIZE, Chess::NONE));
        currentPlayer = Player::BLACK;
    }

    // 下棋
    void playChess(int x, int y) {
        if (x < 0 || x >= SIZE || y < 0 || y >= SIZE || board[x][y] != Chess::NONE) {
            std::cout << "非法操作！" << std::endl;
            return;
        }

        board[x][y] = (currentPlayer == Player::BLACK) ? Chess::BLACK : Chess::WHITE;
        currentPlayer = (currentPlayer == Player::BLACK) ? Player::WHITE : Player::BLACK;
    }

    // 悔棋
    void undoChess() {
        if (history.empty()) {
            std::cout << "无可悔棋的步骤！" << std::endl;
            return;
        }

        auto lastStep = history.back();
        board[lastStep.first][lastStep.second] = Chess::NONE;
        currentPlayer = (currentPlayer == Player::BLACK) ? Player::WHITE : Player::BLACK;
        history.pop_back();
    }

    // 打印当前棋盘
    void printBoard() const {
        for (int i = 0; i < SIZE; ++i) {
            for (int j = 0; j < SIZE; ++j) {
                if (board[i][j] == Chess::NONE) {
                    std::cout << " +";
                } else if (board[i][j] == Chess::BLACK) {
                    std::cout << " x";
                } else {
                    std::cout << " o";
                }
            }
            std::cout << std::endl;
        }
    }

private:
    std::vector<std::vector<Chess>> board;   // 棋盘状态
    Player currentPlayer; // 当前玩家
    std::vector<std::pair<int, int>> history;  // 记录下棋历史
};

int main(int argc, char *argv[]) {
    QCoreApplication a(argc, argv);

    Game game;
    int x, y;
    bool gameOver = false;

    std::cout << "欢迎来到五子棋游戏！" << std::endl;
    std::cout << "请输入坐标进行下棋，输入-1结束游戏，输入-2悔棋：" << std::endl;
    game.printBoard();

    while (!gameOver) {
        std::cin >> x;

        if (x == -1) {
            gameOver = true;
            break;
        } else if (x == -2) {
            game.undoChess();
            game.printBoard();
            continue;
        }

        std::cin >> y;
        game.playChess(x, y);
        game.printBoard();
        // TODO: 检查是否有一方胜利，即五子连珠
    }

    return a.exec();
}

在上面的代码中，使用了一个`Game`类来表示游戏，其中包含了棋盘状态、当前玩家以及下棋历史等成员变量。通过`playChess`函数来下棋，`undoChess`函数实现悔棋操作。`printBoard`函数用于打印当前棋盘状态。

主函数中实例化了一个`Game`对象，并通过循环接受用户输入的坐标，调用`playChess`函数进行下棋操作，并通过`printBoard`打印出当前棋盘状态。用户输入-2时，调用`undoChess`函数进行悔棋操作。用户输入-1时，游戏结束。

暂时未实现检查胜利条件的代码部分，你可以自行添加。

### 回答3：
下面是符合5.14.2qt版本的五子棋代码，能够实现游戏规则和悔棋功能：

#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QMessageBox>
#include <QDebug>
#include <QMouseEvent>

// 棋盘大小
#define CHESSBOARD_SIZE 15

class Chessboard : public QWidget {
public:
    Chessboard(QWidget *parent = nullptr) : QWidget(parent) {
        // 初始化棋盘
        for (int i = 0; i < CHESSBOARD_SIZE; i++) {
            for (int j = 0; j < CHESSBOARD_SIZE; j++) {
                chessboard[i][j] = 0;
            }
        }
        currentPlayer = 1; // 玩家1先手
        setFixedSize(600, 600);
    }

protected:
    void paintEvent(QPaintEvent *event) override {
        Q_UNUSED(event);
        // 绘制棋盘
        QPainter painter(this);
        for (int i = 0; i < CHESSBOARD_SIZE; i++) {
            painter.drawLine(50, 50 + i * 40, 610, 50 + i * 40);
            painter.drawLine(50 + i * 40, 50, 50 + i * 40, 610);
        }

        // 绘制棋子
        for (int i = 0; i < CHESSBOARD_SIZE; i++) {
            for (int j = 0; j < CHESSBOARD_SIZE; j++) {
                if (chessboard[i][j] == 1) {
                    painter.setBrush(QBrush(Qt::black));
                    painter.drawEllipse(50 + i * 40 - 20, 50 + j * 40 - 20, 40, 40);
                } else if (chessboard[i][j] == -1) {
                    painter.setBrush(QBrush(Qt::white));
                    painter.drawEllipse(50 + i * 40 - 20, 50 + j * 40 - 20, 40, 40);
                }
            }
        }
    }

    void mousePressEvent(QMouseEvent *event) override {
        int x = event->x();
        int y = event->y();
        int i = (x - 50) / 40;
        int j = (y - 50) / 40;

        if (i >= 0 && i < CHESSBOARD_SIZE && j >= 0 && j < CHESSBOARD_SIZE && chessboard[i][j] == 0) {
            // 判断胜负
            if (isGameWin(i, j)) {
                QMessageBox::information(this, "胜利", "玩家 " + QString::number(currentPlayer) + " 胜利！");
                resetGame();
                return;
            }

            // 下子
            chessboard[i][j] = currentPlayer;
            currentPlayer = -currentPlayer;
            update();
        }
    }

    void keyPressEvent(QKeyEvent *event) override {
        if (event->key() == Qt::Key_Z && event->modifiers() == Qt::ControlModifier) {
            rollbackLastMove();
        }
    }

private:
    int chessboard[CHESSBOARD_SIZE][CHESSBOARD_SIZE]; // 棋盘
    int currentPlayer; // 当前玩家

    bool isGameWin(int row, int col) {
        int player = chessboard[row][col];
        int count = 1;

        // 横向
        int i = row - 1;
        while (i >= 0 && chessboard[i][col] == player) {
            count++;
            i--;
        }
        i = row + 1;
        while (i < CHESSBOARD_SIZE && chessboard[i][col] == player) {
            count++;
            i++;
        }
        if (count >= 5) {
            return true;
        }

        // 纵向
        count = 1;
        int j = col - 1;
        while (j >= 0 && chessboard[row][j] == player) {
            count++;
            j--;
        }
        j = col + 1;
        while (j < CHESSBOARD_SIZE && chessboard[row][j] == player) {
            count++;
            j++;
        }
        if (count >= 5) {
            return true;
        }

        // 斜向（左上到右下）
        count = 1;
        i = row - 1;
        j = col - 1;
        while (i >= 0 && j >= 0 && chessboard[i][j] == player) {
            count++;
            i--;
            j--;
        }
        i = row + 1;
        j = col + 1;
        while (i < CHESSBOARD_SIZE && j < CHESSBOARD_SIZE && chessboard[i][j] == player) {
            count++;
            i++;
            j++;
        }
        if (count >= 5) {
            return true;
        }

        // 斜向（左下到右上）
        count = 1;
        i = row + 1;
        j = col - 1;
        while (i < CHESSBOARD_SIZE && j >= 0 && chessboard[i][j] == player) {
            count++;
            i++;
            j--;
        }
        i = row - 1;
        j = col + 1;
        while (i >= 0 && j < CHESSBOARD_SIZE && chessboard[i][j] == player) {
            count++;
            i--;
            j++;
        }
        if (count >= 5) {
            return true;
        }

        return false;
    }

    void resetGame() {
        for (int i = 0; i < CHESSBOARD_SIZE; i++) {
            for (int j = 0; j < CHESSBOARD_SIZE; j++) {
                chessboard[i][j] = 0;
            }
        }
        currentPlayer = 1;
        update();
    }

    void rollbackLastMove() {
        for (int i = CHESSBOARD_SIZE - 1; i >= 0; i--) {
            for (int j = CHESSBOARD_SIZE - 1; j >= 0; j--) {
                if (chessboard[i][j] != 0) {
                    chessboard[i][j] = 0;
                    currentPlayer = -currentPlayer;
                    update();
                    return;
                }
            }
        }
    }
};

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    Chessboard chessboard;
    chessboard.show();

    return app.exec();
}

以上就是一个简单的五子棋游戏代码，通过QPainter绘制棋盘和棋子，通过鼠标点击来下子，并实现了胜利判断和悔棋功能。