C++基于qt 的五子棋悔棋代码

以下是基于Qt的五子棋悔棋代码示例：

（1）在mainwindow.h中添加如下代码：

private:
    int chessboard[15][15]; // 用来存储棋盘信息
    int player; // 玩家标志，1表示黑棋，2表示白棋
    int step; // 记录步数
    bool isUndo; // 是否悔棋标志
    QList<QPair<int, int>> historyList; // 用来存储历史记录

（2）在mainwindow.cpp中添加如下代码：

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // 初始化棋盘信息
    memset(chessboard, 0, sizeof(chessboard));
    player = 1;
    step = 0;
    isUndo = false;

    // 绑定悔棋按钮点击事件
    connect(ui->undoBtn, &QPushButton::clicked, this, &MainWindow::undo);

    // 绑定棋盘点击事件
    connect(ui->chessBoard, &ChessBoard::clicked, this, &MainWindow::playChess);
}

void MainWindow::playChess(int row, int col)
{
    if (chessboard[row][col] != 0) {
        QMessageBox::warning(this, tr("Warning"), tr("The position has been occupied!"));
        return;
    }

    // 绘制棋子
    ui->chessBoard->drawChess(row, col, player);

    // 记录历史记录
    historyList.append(qMakePair(row, col));

    // 更新棋盘信息
    chessboard[row][col] = player;
    step++;

    // 判断是否有胜者
    if (ui->chessBoard->isWin(row, col)) {
        QMessageBox::information(this, tr("Congratulations"), tr("Player %1 wins!").arg(player == 1 ? tr("Black") : tr("White")));
        ui->chessBoard->setEnabled(false);
        return;
    }

    // 判断是否平局
    if (step == 225) {
        QMessageBox::information(this, tr("Tie"), tr("Tie game!"));
        ui->chessBoard->setEnabled(false);
        return;
    }

    // 切换玩家
    player = player == 1 ? 2 : 1;
}

void MainWindow::undo()
{
    if (step == 0) {
        QMessageBox::warning(this, tr("Warning"), tr("There is no step to undo!"));
        return;
    }

    // 获取历史记录中的最后一步
    QPair<int, int> lastStep = historyList.last();
    int row = lastStep.first;
    int col = lastStep.second;

    // 悔棋
    ui->chessBoard->undoChess(row, col);

    // 更新棋盘信息
    chessboard[row][col] = 0;
    step--;

    // 切换玩家
    player = player == 1 ? 2 : 1;

    // 删除历史记录中的最后一步
    historyList.removeLast();
}

（3）在chessboard.cpp中添加如下代码：

void ChessBoard::drawChess(int row, int col, int player)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);
    painter.setPen(Qt::NoPen);

    if (player == 1) {
        painter.setBrush(Qt::black);
    } else {
        painter.setBrush(Qt::white);
    }

    painter.drawEllipse(QPointF((col + 0.5) * gridSize(), (row + 0.5) * gridSize()), gridSize() / 2 - 2, gridSize() / 2 - 2);
}

bool ChessBoard::isWin(int row, int col)
{
    int count = 1; // 连续棋子的数量

    // 判断横向是否有五个棋子相连
    for (int i = col - 1; i >= 0; i--) {
        if (m_chessboard[row][i] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    for (int i = col + 1; i < 15; i++) {
        if (m_chessboard[row][i] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    if (count >= 5) {
        return true;
    }

    // 判断纵向是否有五个棋子相连
    count = 1;
    for (int i = row - 1; i >= 0; i--) {
        if (m_chessboard[i][col] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    for (int i = row + 1; i < 15; i++) {
        if (m_chessboard[i][col] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    if (count >= 5) {
        return true;
    }

    // 判断左上到右下是否有五个棋子相连
    count = 1;
    for (int i = row - 1, j = col - 1; i >= 0 && j >= 0; i--, j--) {
        if (m_chessboard[i][j] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    for (int i = row + 1, j = col + 1; i < 15 && j < 15; i++, j++) {
        if (m_chessboard[i][j] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    if (count >= 5) {
        return true;
    }

    // 判断左下到右上是否有五个棋子相连
    count = 1;
    for (int i = row + 1, j = col - 1; i < 15 && j >= 0; i++, j--) {
        if (m_chessboard[i][j] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    for (int i = row - 1, j = col + 1; i >= 0 && j < 15; i--, j++) {
        if (m_chessboard[i][j] != m_chessboard[row][col]) {
            break;
        }
        count++;
    }
    if (count >= 5) {
        return true;
    }

    return false;
}

void ChessBoard::undoChess(int row, int col)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);

    painter.setPen(QPen(Qt::black, 2));
    painter.setBrush(Qt::NoBrush);
    painter.drawRect(col * gridSize(), row * gridSize(), gridSize(), gridSize());

    if (m_chessboard[row][col] == 1) {
        painter.setPen(QPen(Qt::black, 1));
        painter.setBrush(Qt::black);
    } else {
        painter.setPen(QPen(Qt::white, 1));
        painter.setBrush(Qt::white);
    }

    painter.drawEllipse(QPointF((col + 0.5) * gridSize(), (row + 0.5) * gridSize()), gridSize() / 2 - 2, gridSize() / 2 - 2);

    m_chessboard[row][col] = 0;
}

以上代码实现了基于Qt的五子棋悔棋功能，可以参考编写。