#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACEenum ChessType
{NullChess,RJu,RMa,RXiang,RShi,RJiang,RPao,RBing,BJu,BMa,BXiang,BShi,BJiang,BPao,BBing,
};//枚举红黑双方棋子种类class MainWindow : public QMainWindow
{Q_OBJECTpublic:MainWindow(QWidget *parent = nullptr);~MainWindow();void paintEvent(QPaintEvent * event);//绘图事件void mousePressEvent(QMouseEvent * event);//鼠标事件void InitChess();//初始化棋盘void DrawChess(QPainter * painter, int row, int col, ChessType type);绘制棋子int general();//将行走规则int guard();//士行走规则int minister();//相行走规则int horse();//马行走规则int carriage();//车行走规则int artillery();//炮行走规则int soldier();//行走规则int guilei(ChessType type);//将棋子归类，分为红方棋子、黑方棋子、空棋子int panduan(ChessType type);//判断棋子行走是否符合规则void New();//参数重置private:Ui::MainWindow *ui;QPoint stpos,edpos;//stpos为棋盘左上方第一个子的点，edpos为棋盘右下方第一个子的点int W,H;//棋盘一格的宽度ChessType chess[10][9];//定义一个棋子数组int i,j,m,n,a,k,U,P;//P为悔棋后的步数，必须大于等于2，才能再次悔棋，否则可能无限悔棋下去ChessType type1,type2,type3,type4,type5,type6;int a1,a2,b1,b2,c1,c2,d1,d2,e1,e2,f1,f2;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QPainter>
#include <QDebug>
#include <QMouseEvent>
#include<qmath.h>MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{ui->setupUi(this);stpos = QPoint(70,40);edpos = QPoint(630,660);W = (edpos.x() - stpos.x())/8;H = (edpos.y() - stpos.y())/9;New();
}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::paintEvent(QPaintEvent * event)
{QPainter painter(this);QRect rect = this->rect();rect.setWidth(rect.width()-200);//右侧留出按钮的位置painter.drawPixmap(rect,QPixmap("://res/background.png"));for (int x=0;x<10;x++)for (int y=0;y<9;y++)if (chess[x][y]!=NullChess)DrawChess(&painter,x,y,chess[x][y]);if (i>=0 && j>=0 && m==-1 && n==-1){QRect rect(stpos.x()+(j-0.5)*W,stpos.y()+(i-0.5)*H,W,H);painter.drawPixmap(rect,QPixmap("://res/selected.png"));}//选中的棋子加上框，方便使用者QRect q1(755,350,85,35);QRect q2(0,0,114,56);painter.drawPixmap(q1,QPixmap(":/res/start.jpg"),q2);//添加开始按钮QRect q3(755,450,85,35);painter.drawPixmap(q3,QPixmap(":/res/regret.jpg"),q2);//添加悔棋按钮QRect q4(700,0,200,200);QRect q5(0,0,255,255);if (a == 1)painter.drawPixmap(q4,QPixmap(":/res/yingjiemian.png"),q5);//a=1时展示黑方赢提示if (a == 2)painter.drawPixmap(q4,QPixmap(":/res/shuijiemian.png"),q5);//a=2时展示红方赢提示
}void MainWindow::mousePressEvent(QMouseEvent * event)
{qDebug()<<event->pos();//显示鼠标点击时的点的坐标if (event->button() == Qt::LeftButton)//获取当前鼠标左键的位置{int row = (event->y()-stpos.y()+0.5*H)/H;int col = (event->x()-stpos.x()+0.5*W)/W;//此时的位置转化为行列if (event->x()>=755 && event->x()<=840 && event->y()>=350 && event->y()<=385)New();
//若此时点击开始，则重置所有参数，开始新的一局if (event->x()>=755 && event->x()<=840 && event->y()>=450 && event->y()<=485 && k>=4 && P>=2){if (!(k%2)){chess[a1][a2] = type1;chess[b1][b2] = type2;chess[c1][c2] = type3;chess[d1][d2] = type4;k-=2;P = 0;}else if (k%2){chess[c1][c2] = type3;chess[d1][d2] = type4;chess[a1][a2] = type1;chess[b1][b2] = type2;k-=2;P = 0;}}
//若此时点击悔棋，则双方各退一步，也就是一回合if ((U && row>=0 && row<=9 && col>=0 && col<=8 && i==-1 && j==-1 && guilei(chess[row][col])==k % 2) ||(U && i>=0 && j>=0 && guilei(chess[row][col])==k % 2))////U为判断游戏是否结束的参数，若结束，则不能继续取子{i = row;j = col;}if (i>=0 && j>=0 && (i!=row ||j!=col)){m = row;n = col;if (panduan(chess[i][j])){k++;P++;}else{m = -1;n = -1;}}repaint();//发送重新绘制指令}if (i>=0 && j>=0 && m>=0 && n>=0){if (!(guilei(chess[i][j]) == guilei(chess[m][n]) || chess[i][j] == NullChess ||guilei(chess[i][j]) == guilei(chess[m][n]) || (i == m && j == n)) && panduan(chess[i][j])){if (chess[m][n] == RJiang)a = 1;if (chess[m][n] == BJiang)a = 2;//若落子点为将帅，则判断谁胜谁负if (!(k%2)){type1 = chess[i][j];a1 = i;a2 = j;type2 = chess[m][n];b1 = m;b2 = n;}else if (k%2){type3 = chess[i][j];c1 = i;c2 = j;type4 = chess[m][n];d1 = m;d2 = n;}//不同的回合分别保存相应玩家的棋子行走记录chess[m][n] = chess[i][j];chess[i][j] = NullChess;repaint();if (a)U = 0;}i = -1;j = -1;}m = -1;n = -1;
//走棋一次后将i,j,m,n重置,等待下一次走棋
}void MainWindow::InitChess()
{for (int i=0;i<10;i++)for (int j=0;j<9;j++){chess[i][j] = NullChess;}chess[0][0]=RJu;chess[0][1]=RMa;chess[0][2]=RXiang;chess[0][3]=RShi;chess[0][4]=RJiang;chess[9][0]=BJu;chess[9][1]=BMa;chess[9][2]=BXiang;chess[9][3]=BShi;chess[9][4]=BJiang;for (int j=0;j<4;j++){chess[0][8-j]=chess[0][j];chess[9][8-j]=chess[9][j];}chess[2][1]=RPao;chess[2][7]=RPao;chess[7][1]=BPao;chess[7][7]=BPao;for (int j=0;j<=8;j+=2){chess[3][j]=RBing;chess[6][j]=BBing;}
}//初始化棋盘void MainWindow::DrawChess(QPainter * painter,int row,int col,ChessType type)
{QPixmap pix;switch(type){case RJu:pix = QPixmap("://res/rr.png");break;case RMa:pix = QPixmap("://res/rn.png");break;case RXiang:pix = QPixmap("://res/rb.png");break;case RShi:pix = QPixmap("://res/ra.png");break;case RJiang:pix = QPixmap("://res/icon.png");break;case RPao:pix = QPixmap("://res/rc.png");break;case RBing:pix = QPixmap("://res/rp.png");break;case BJu:pix = QPixmap("://res/br.png");break;case BMa:pix = QPixmap("://res/bn.png");break;case BXiang:pix = QPixmap("://res/bb.png");break;case BShi:pix = QPixmap("://res/ba.png");break;case BJiang:pix = QPixmap("://res/bk.png");break;case BPao:pix = QPixmap("://res/bc.png");break;case BBing:pix = QPixmap("://res/bp.png");break;}QRect rect(stpos.x()+(col-0.5)*W,stpos.y()+(row-0.5)*H,W,H);painter->drawPixmap(rect,pix);
}//不同种类的棋子选择相应的棋子进行绘制int MainWindow::general()
{if (chess[i][j] == RJiang){if (chess[m][n] == BJiang){int k = 0, p = i + 1;while (chess[p][j] != BJiang){if (chess[p][j] != NullChess)k++;p ++;}if (!k)return 1;else return 0;}//帅吃将规则else if (m >= 0 && m <= 2 && n >= 3 && n <= 5 && (pow(m - i, 2) + pow(n - j, 2)) == 1)return 1;elsereturn 0;}//帅米字格行走规则else if (chess[i][j] == BJiang){if (chess[m][n] == RJiang){int k = 0, p = i - 1;while (chess[p][j] != RJiang){if (chess[p][j] != NullChess)k++;p --;}if (!k)return 1;else return 0;}//将吃帅规则else if (m >= 7 && m <= 9 && n >= 3 && n <= 5 && (pow(m - i, 2) + pow(n - j, 2)) == 1)return 1;else return 0;}else return 0;//帅米字格行走规则
}int MainWindow::guard()
{if (chess[i][j] == RShi){if (m >= 0 && m <= 2 && n >= 3 && n <= 5 && (pow(m - i, 2) + pow(n - j, 2)) == 2)return 1;else return 0;}else if (chess[i][j] == BShi){if (m >= 7 && m <= 9 && n >= 3 && n <= 5 && (pow(m - i, 2) + pow(n - j, 2)) == 2)return 1;else return 0;}else return 0;
}
//士米字格行走规则int MainWindow::minister()
{if (chess[i][j] == RXiang){if (m <= 4 && chess[(i+m)/2][(j+n)/2] == NullChess && (pow(m - i, 2) + pow(n - j, 2)) == 8)return 1;else return 0;}else if (chess[i][j] == BXiang){if (m >= 5 && chess[(i+m)/2][(j+n)/2] == NullChess && (pow(m - i, 2) + pow(n - j, 2)) == 8)return 1;else return 0;}else return 0;
}
//相行走规则
int MainWindow::horse()
{if ((pow(m - i, 2) + pow(n - j, 2)) == 5){if (abs(m - i) == 2){if (chess[(i + m)/2][j] == NullChess)return 1;else return 0;}else if (abs(n - j) == 2){if (chess[i][(j + n)/2] == NullChess)return 1;else return 0;}}else return 0;
}
//马行走规则
int MainWindow::carriage()
{if (n - j == 0)//纵向行走{int k = 0, o = (m - i) / abs(m - i), p = i + o;while (p != m){if (chess[p][j] != NullChess)k++;p += o;}if (!k)return 1;else return 0;}else if (m - i == 0)//横向行走{int k = 0, o = (n - j) / abs(n - j), p = j + o;while (p != n){if (chess[i][p] != NullChess)k++;p += o;}if (!k)return 1;else return 0;}else return 0;
}
//车行走规则
int MainWindow::artillery()
{if (n - j == 0)//纵向行走{int k = 0, o = (m - i) / abs(m - i), p = i + o;while (p != m){if (chess[p][j] != NullChess)k++;p += o;}if ((k == 0 && chess[m][n] == NullChess) || (k == 1 && chess[m][n] != NullChess))//k=0时，途中无子，为行走规则；k=1时，途中有一子，为吃子规则return 1;else return 0;}else if (m - i == 0)//横向行走{int k = 0, o = (n - j) / abs(n - j), p = j + o;while (p != n){if (chess[i][p] != NullChess)k++;p += o;}if ((k == 0 && chess[m][n] == NullChess) || (k == 1 && chess[m][n] != NullChess))return 1;else return 0;}else return 0;
}int MainWindow::soldier()
{if (chess[i][j] == RBing){if (m >= i){if (i <= 4 && (pow(m - i, 2) + pow(n - j, 2)) == 1 && (n - j) == 0)return 1;//不过河行走规则else if (i >= 5 && (pow(m - i, 2) + pow(n - j, 2)) == 1)return 1;//过河行走规则else return 0;}else return 0;}else if (chess[i][j] == BBing){if (m <= i){if (i >= 5 && (pow(m - i, 2) + pow(n - j, 2)) == 1 && (n - j) == 0)return 1;else if (i <= 4 && (pow(m - i, 2) + pow(n - j, 2)) == 1)return 1;else return 0;}else return 0;}else return 0;
}
//兵行走规则
int MainWindow::guilei(ChessType type)
{if (type == RJiang || type == RShi || type == RXiang || type == RMa || type == RJu || type == RPao || type == RBing)return 0;if (type == BJiang || type == BShi || type == BXiang || type == BMa || type == BJu || type == BPao || type == BBing)return 1;if (type == NullChess)return 2;
}
//将棋子归类，分为红、黑、空int MainWindow::panduan(ChessType type)
{if (type == RJiang || type == BJiang)return general();else if (type == RShi || type == BShi)return guard();else if (type == RXiang || type == BXiang)return minister();else if (type == RMa || type == BMa)return horse();else if (type == RJu || type == BJu)return carriage();else if (type == RPao || type == BPao)return artillery();else return soldier();
}
//判断棋子行走是否符合规则void MainWindow::New()
{InitChess();i = -1;j = -1;m = -1;n = -1;a = 0;k = 2;U = 1;P = 2;type1 = NullChess;type2 = NullChess;type3 = NullChess;type4 = NullChess;type5 = NullChess;type6 = NullChess;a1 = 0;a2 = 0;b1 = 0;b2 = 0;c1 = 0;c2 = 0;d1 = 0;d2 = 0;e1 = 0;e2 = 0;f1 = 0;f2 = 0;
}
//参数重置，开始新的一局

悔棋规则为：假如轮到黑方落子，可以点悔棋，双方各退一步，接下来还是由黑方落子。

效果图如下：