蒟蒻今天闲着没事干，来写了一个五子棋，主要是写了个人机对战，然后想把电脑弄得强一点。想了想实现有点难，毕竟还要用到博弈论，所以就写了个简单点的。
里面包含了两个难度，其实他两没什么关系，一种是完全随机（说白了就是乱走），另外一个会下在玩家下的附近，还算是好很多了，至少我测试的时候开6*6的棋盘玩家应该是赢不了的。
下面附上代码（有点懒没打注释，但是名字还是起好了）
可以先玩一把试试，说不准就想看看了，大佬勿喷
#include
#include
#include
#include
using namespace std;
void GameBegin();
void BoardInit();
void BoardDisplay();
void PlayerTurn();
void BoardDestroy();
void wrong();
bool WinCheck();
void ComputerEasy();
bool isfull();
void ComputerHard();
int mode, col, row, COL, ROW, pre = 0;//prevent
char** board;
struct FULL{
int y, x;
} full;
int main() {
srand(time(0));
int opera;
while (true) {
cout << "**********************\n"
"*0.exit 1.easy 2.hard*\n"
"**********************\n";
if (cin >> opera) {
switch (opera) {
case 0: return 0;
case 1: mode = 1; GameBegin(); break;
case 2: mode = 0; GameBegin(); break;
default: wrong();
}
}
else {
wrong();
for (char ch = getchar(); ch != '\n'; );
}
}
}
void GameBegin() {
BoardInit();
BoardDisplay();
while (true) {
PlayerTurn();
if (WinCheck()) {
BoardDisplay();
cout << "YOU WIN!" << endl;
break;
}
if (isfull()) {
BoardDestroy();
return;
}
if (mode) ComputerEasy();
else {
pre = 0;
ComputerHard();
}
if (WinCheck()) {
BoardDisplay();
cout << "YOU LOSE" << endl;
}
BoardDisplay();
if (isfull()) {
BoardDestroy();
return;
}
}
BoardDestroy();
}
void BoardInit() {
cout << "Please enter the size of the board (row,col)" << endl;
cin >> ROW >> COL;
board = new char* [ROW + 1];
for (int i = 0; i <= ROW; i++) {
board[i] = new char[COL + 1];
memset(board[i], ' ', COL + 1);
}
full.y = full.x = 1;
}
void BoardDisplay() {
cout << endl;
for (int i = 0; i < COL; i++) cout << "****";
cout << endl;
for (int i = 1; i <= ROW; i++) {
for (int j = 1; j <= COL; j++) {
cout << " " << board[i][j] << " ";
if (j < COL) cout << '|';
else cout << endl;
}
for (int j = 1; i < ROW && j <= COL; j++) {
cout << "---";
if (j < COL) cout << '+';
else cout << endl;
}
}
for (int i = 0; i < COL; i++) cout << "****";
cout << endl;
}
void PlayerTurn() {
cout << "Enter X,Y coordinates for your move (row, col)" << endl;
while (true) {
if (cin >> row >> col) {
if(row > 0 && col > 0 && row <= ROW && col <= COL) {
if (board[row][col] != ' ') {
wrong();
continue;
}
board[row][col] = '*';
return;
}
else {
wrong();
break;
}
}
else {
wrong();
for (char ch = getchar(); ch != '\n'; );
}
}
}
void ComputerEasy() {
while (true) {
col = rand() % COL;
row = rand() % ROW;
if (board[row][col] != ' ') continue;
board[row][col] = '#';
break;
}
}
void ComputerHard() {
int dr[] = { 1, 1, 0, -1, -1, -1, 0, 1 }; // 行的方向
int dc[] = { 0, 1, 1, 1, 0, -1, -1, -1 }; // 列的方向
int DP[8] = {0}, hs[8] = {0};
int maxx = -1, num;
for (int i = 0; i < 8; i++) {
int j = (i + 4) % 8;
if(row + dr[j] <= 0 || row + dr[j] > ROW || col + dc[j] <= 0 || col + dc[j] > COL) continue;
if (board[row + dr[j]][col + dc[j]] != ' ') hs[j] = 1;
num = 0;
for (int y = row, x = col; y > 0 && x > 0 && y <= ROW && x <= COL && board[y][x] == '*'; y += dr[i], x += dc[i]) {
num++;
}
DP[j] = num;
if (maxx < num) {
maxx = num;
}
}
while(true) {
if(pre == 120) ComputerEasy();
int j = rand() % 8;
if(DP[j] != maxx && pre < 100) continue;
pre++;
if(hs[j] == 1) {
for(int y = row + dr[j], x = col + dc[j]; ; y += dr[j], x += dc[j]) {
if(y > 0 && x > 0 && y <= ROW && x <= COL) {
if(board[y][x] == ' ') {
col = x, row = y;
board[y][x] = '#';
return;
}
if(board[y][x] == '#') {
pre++;
break;
}
}
pre++;
}
}
else {
int x = col + dc[j], y = row + dr[j];
if(y > 0 && x > 0 && y <= ROW && x <= COL) {
col = x, row = y;
board[row][col] = '#';
return;
}
pre++;
break;
}
}
}
bool WinCheck() {
int cnt[4] = { 0 };
for (int i = -4; i <= 4; i++) {
if (row + i > 0 && row + i <= ROW && board[row + i][col] == board[row][col]) cnt[0]++; else cnt[0] = 0;
if (col + i > 0 && col + i <= COL && board[row][col + i] == board[row][col]) cnt[1]++; else cnt[1] = 0;
if (row + i > 0 && row + i <= ROW && col + i > 0 && col + i <= COL && board[row + i][col + i] == board[row][col]) cnt[2]++; else cnt[2] = 0;
if (row + i > 0 && row + i <= ROW && col - i > 0 && col - i <= COL && board[row + i][col - i] == board[row][col]) cnt[3]++; else cnt[3] = 0;
for (int j = 0; j < 4; j++) if (cnt[j] == 5) return true;
}
return false;
}
void BoardDestroy() {
for (int i = 0; i <= ROW; i++) {
delete[] board[i];
}
delete[] board;
board = NULL;
}
void wrong() {
cout << "Invalid input!" << endl << "Please enter again" << endl;
}
bool isfull() {
while (board[full.y][full.x] != ' ') {
if (full.x > COL) {
full.y++;
full.x = 1;
}
if (full.y == ROW && full.x == COL) {
cout << "The board is full";
return true;
}
full.x++;
}
return false;
}
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