您好，我正在尝试使用MiniMax算法创建无与伦比的井字游戏。我一直在运行它以解决我的代码问题。我的MiniMax算法似乎可以运行，但是一旦找到最佳播放效果，它就不会终止。在229-242行中，我为MiniMax算法建立了要终止的参数，但它会继续执行而不会停止。我不确定要使其终止并输出最佳动作我到底需要做什么。
#include <iostream>
#include <string>
using namespace std;
// Structure
struct Computer
{
int Row;
int Column;
};
// Constants
const int Human_Player = 1; // To hold the integer value of Player 1
const int AI_Player = 2; // To hold the integer value of Player 2
const int GRID_SIZE = 3; // To hold the grid size of the array
const char Human_Move = 'X'; // To hold the
const char AI_Move = 'O';
// Global variable
int index = 0; // Variable to keep track of the number of moves
// Function prototypes
Computer Best_Computer_Move(char Board[][GRID_SIZE], int Player);
void Play_Game();
void Initial_Board(char Array[][GRID_SIZE]);
void Display_Board(char Array[][GRID_SIZE]);
void Turn(char Game_Board[][GRID_SIZE], int Whose_Turn);
int Check_For_Winner(char Game_Board[][GRID_SIZE]);
int Min_Max(char Board[][GRID_SIZE], int Depth, bool isMax);
int main()
{
Play_Game();
return 0;
}
//*******************************************
// Definition of Play_Game function. *
//*******************************************
void Play_Game()
{
char Board[GRID_SIZE][GRID_SIZE]; // Declare a char array
Initial_Board(Board); // Call the Initial_Board function to display the Initial board
Turn(Board, Human_Player); // The Turn function to Play
}
//*******************************************
// Definition of Initial_Board function. *
//*******************************************
void Initial_Board(char Array[][GRID_SIZE])
{
int number = 1;
for (int i = 0; i < GRID_SIZE; i++)
{
for (int j = 0; j < GRID_SIZE; j++)
{
Array[i][j] = to_string(number).c_str()[0]; // Set the contents of the array equal to number
number += 1;
}
}
Display_Board(Array);
}
//*******************************************
// Definition of Display_Board function. *
//*******************************************
void Display_Board(char Array[][GRID_SIZE])
{
cout << "\t-------\n";
for (int i = 0; i < GRID_SIZE; i++) // Loop through the array and display it contents
{
cout << "\t|";
for (int j = 0; j < GRID_SIZE; j++)
{
cout << (Array[i][j]) << "|";
}
cout << "\n\t-------\n";
}
}
//***********************************
// Definition of Turn function. *
//***********************************
void Turn(char Game_Board[][GRID_SIZE], int Whose_Turn)
{
int input; // To hold user input
while((Check_For_Winner(Game_Board) == 0) && (index != GRID_SIZE * GRID_SIZE))
{
if (Whose_Turn == Human_Player)
{
cout << "Player 1(Human) select a cell(1 - 9) to place your move." << endl;
while(!(cin >> input) || ((input <= 0 ) || (input > 9 ))) // Input validation. Display an error message if the amount is less than 0.
{
cout << "ERROR!!! The number cannot be less than 0 or greater than 9.";
cin.clear(); // Clear the what was input into the variable value.
cout << "\nPlease enter a number between 0 and 9: " << endl;
cin.ignore(123, '\n');
}
int row = (input - 1) / 3;
int column = (input - 1) % 3;
char Grid_Position = Game_Board[row][column];
if ((Grid_Position == 'X') || (Grid_Position == 'O'))
{
cout << "ERROR!!! A move has already been made there." << endl;
}
else
{
Game_Board[row][column] = Human_Move;
index++;
Display_Board(Game_Board);
Whose_Turn = AI_Player;
}
}
else if (Whose_Turn == AI_Player)
{
cout << "AI Player's turn" << endl;
Computer Computer_Move;
Computer_Move = Best_Computer_Move(Game_Board, AI_Player);
Game_Board[Computer_Move.Row][Computer_Move.Column] = AI_Move;
cout << "The value of AI is " << Game_Board[Computer_Move.Row][Computer_Move.Column] << endl;
index++;
cout << "Row is " << Computer_Move.Row << endl;
cout << "Column is " << Computer_Move.Column << endl;
cout << "AI Player has moved" << endl;
Display_Board(Game_Board);
Whose_Turn = Human_Player;
}
}
if (Check_For_Winner(Game_Board) != 0) // Declare a winner
{
if (Check_For_Winner(Game_Board) == -10) // If the score is -10
cout << "Congratulations!!! Player 1 has won!!!" << endl;
else if (Check_For_Winner(Game_Board) == 10)
cout << "Congratulations!!! Player 2 has won!!!" << endl;
}
else if ((Check_For_Winner(Game_Board) == 0) && (index == GRID_SIZE * GRID_SIZE))
cout << "It's a draw! Neither player has won." << endl;
}
//***********************************************
// Definition of Check_For_Winner function. *
//***********************************************
int Check_For_Winner(char Game_Board[][GRID_SIZE])
{
// Check horizontal for winning conditions
for (int i = 0; i < GRID_SIZE; i++)
{
if (((Game_Board[i][0]) == (Game_Board[i][1])) &&
((Game_Board[i][1]) == (Game_Board[i][2])) &&
((Game_Board[i][2]) == (Game_Board[i][0])))
{
if ((Game_Board[i][0]) == AI_Move)
return 10;
else if ((Game_Board[i][0]) == Human_Move)
return -10;
}
}
// Check vertical for winning conditions
for (int j = 0; j < GRID_SIZE; j++)
{
if (((Game_Board[0][j]) == ((Game_Board[1][j]))) &&
((Game_Board[1][j]) == ((Game_Board[2][j]))) &&
((Game_Board[2][j]) == ((Game_Board[0][j]))))
{
if ((Game_Board[0][j]) == AI_Move)
return 10;
else if ((Game_Board[0][j]) == Human_Move)
return -10;
}
}
// Check diagonal for winning conditions
if (((Game_Board[0][0]) == (Game_Board[1][1])) &&
((Game_Board[1][1]) == (Game_Board[2][2])) &&
((Game_Board[2][2]) == (Game_Board[0][0])))
{
if ((Game_Board[0][0]) == AI_Move)
return 10;
else if ((Game_Board[0][0]) == Human_Move)
return -10;
}
// Check diagonal for winning conditions
else if (((Game_Board[0][2]) == (Game_Board[1][1])) &&
((Game_Board[1][1]) == (Game_Board[2][0])) &&
((Game_Board[2][0]) == (Game_Board[0][2])))
{
if ((Game_Board[0][2]) == AI_Move)
return 10;
else if ((Game_Board[0][2]) == Human_Move)
return -10;
}
return 0;
}
//*******************************************
// Definition of Min_Max function. *
//*******************************************
int Min_Max(char Board[][GRID_SIZE], int Depth, bool isMax)
{
int Max_Move = -1000;
int Score = Check_For_Winner(Board); // Set the value of Score
cout << "The value of Score is " << Score << endl;
if (Score == 10) // Return the value of Score if the computer has won
{
return (Score - Depth);
}
else if (Score == -10) // Return the value of Score if the human player has won
{
return (Depth - Score);
}
else if ((Check_For_Winner(Board) == 0) && (index == GRID_SIZE * GRID_SIZE))
{
return 0;
}
else if (isMax == false) // Computer Player's turn
{
for (int i = 0; i < GRID_SIZE; i++)
{
for (int j = 0; j < GRID_SIZE; j++)
{
// Check to see if a player has made a move there
while (!((Board[i][j] == 'X') || (Board[i][j] == 'O')))
{
// Store the current value of the element in the array
char Temporary = Board[i][j];
cout << "The contents of temporary for Max is " << Temporary << endl;
// Make the move for the computer
Board[i][j] = AI_Move;
cout << "The value for the element Max is " << Board[i][j] << endl;
Display_Board(Board);
cout << "The value of Max_Move " << Max_Move << endl;
Max_Move = max(Max_Move,
Min_Max(Board, Depth++, !isMax));
// Undo the move made by the computer
Board[i][j] = Temporary;
cout << "The contents of temporary for Max is " << Temporary << endl;
}
}
}
return Max_Move;
}
else if (isMax == true) // Human Player's turn
{
int Min_Move = 1000;
for (int i = 0; i < GRID_SIZE; i++)
{
for (int j = 0; j < GRID_SIZE; j++)
{
// Check to see if a player has made a move there
while (!((Board[i][j] == 'X') || (Board[i][j] == 'O')))
{
// Store the current value of the element in the array
char Temporary_2 = Board[i][j];
cout << "The contents of temporary for Min is " << Temporary_2 << endl;
// Make the move for the Human player
Board[i][j] = Human_Move;
cout << "The value for the element Min is " << Board[i][j] << endl;
Display_Board(Board);
Min_Move = min(Min_Move,
Min_Max(Board, Depth++, !isMax));
// Undo the move made for the Human player
Board[i][j] = Temporary_2;
cout << "The contents of temporary for Min is " << Temporary_2 << endl;
}
}
}
return Min_Move;
}
return 0;
}
//***********************************************************
// Definition of structure function Best_Computer_Move. *
//***********************************************************
Computer Best_Computer_Move(char Board[][GRID_SIZE], int Player)
{
cout << "You are in the structure" << endl;
int Best_Value = -1000;
Computer Best_Move; // Create a structure variable
Best_Move.Row = -1;
Best_Move.Column = -1;
for (int i = 0; i < GRID_SIZE; i++)
{
for (int j = 0; j < GRID_SIZE; j++)
{
// Check to see if a player has made a move there
while (!((Board[i][j] == 'X') || (Board[i][j] == 'O')))
{
cout << "i = " << i << " j = " << j << endl;
// Store the current value of the element in the array
char Temporary = Board[i][j];
cout << "The contents of temporary int the structure is " << Temporary << endl;
// Make the move for the computer
Board[i][j] = AI_Move;
cout << Board[i][j] << endl;
// Calculate the Maximizing move
int Value = Min_Max(Board, 0, false);
// Undo the move made by the computer
Board[i][j] = Temporary;
if (Value > Best_Value)
{
Best_Move.Row = i;
Best_Move.Column = j;
Best_Value = Value;
}
}
}
}
return Best_Move;
}