I just need a help in replacing player 2 and to make it
unbeatable
here is my code:
#include<iostream>
using namespace std;
const int ROWS=3;
const int COLS=3;
void fillBoard(char [][3]);
void showBoard(char [][3]);
void getChoice(char [][3],bool);
bool gameOver(char [][3]);
int main()
{
char board[ROWS][COLS];
bool playerToggle=false;
fillBoard(board);
showBoard(board);
while(!gameOver(board))
{
getChoice(board,playerToggle);
showBoard(board);
playerToggle=!playerToggle;
}
return 1;
}
void fillBoard(char board[][3])
{
for(int i=0;i<ROWS;i++)
for(int j=0;j<COLS;j++)
board[i][j]='*';
}
void showBoard(char board[][3])
{
cout<<" 1 2 3"<<endl;
for(int i=0;i<ROWS;i++)
{
cout<<(i+1)<<" ";
for(int j=0;j<COLS;j++)
{
cout<<board[i][j]<<" ";
}
cout<<endl;
}
}
bool gameOver(char board[][3])
{
bool win=false;
for(int i=0;i<3;i++)
{
if(board[i][0]=='X' &&board[i][1]=='X' && board[i][2]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
if(board[0][i]=='X' &&board[1][i]=='X' && board[2][i]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
}
if(board[0][0]=='X' && board[1][1]=='X' && board[2][2]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
if(board[0][2]=='X' && board[1][1]=='X' && board[2][0]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
for(int i=0;i<3;i++)
{
if(board[i][0]=='O' &&board[i][1]=='O' && board[i][2]=='O')
{
cout<<"Player 2 Wins!"<<endl;
win=true;
return win;
}
if(board[0][i]=='O' &&board[1][i]=='O' && board[2][i]=='O')
{
cout<<"Player 2 Wins!"<<endl;
win=true;
return win;
}
}
if(board[0][0]=='O' && board[1][1]=='O' && board[2][2]=='O')
{
cout<<"Player 2 Wins!"<<endl;
win=true;
return win;
}
if(board[0][2]=='O' && board[1][1]=='O' && board[2][0]=='O')
{
cout<<"Player 2 Wins!"<<endl;
win=true;
return win;
}
for(int i=0;i<ROWS;i++)
{
for(int j=0;j<COLS;j++)
{
if(board[i][j]=='*')
return win;
}
}
cout<<"Tie!"<<endl;
return true;
}
void getChoice(char board[][3],bool playerToggle)
{
char symbol;
int player;
int row,col;
if(playerToggle)
{
symbol='O';
player=2;
}
else
{
symbol='X';
player=1;
}
while(true)
{
while(true)
{
cout<<"Player "<<player<<", Row: ";
cin>>row;
if(row>=1 && row<=3)
break;
}
while(true)
{
cout<<"Player "<<player<<", Column: ";
cin>>col;
if(col>=1 && col<=3)
break;
}
if(board[row-1][col-1]=='*')
{
board[row-1][col-1]=symbol;
break;
}
else
cout<<endl;
}
}
Homework Answers
Code
#include<iostream>
using namespace std;
const int ROWS=3;
const int COLS=3;
void fillBoard(char [][3]);
void showBoard(char [][3]);
void getChoice(char [][3],bool);
bool gameOver(char [][3]);
int main()
{
char board[ROWS][COLS];
bool playerToggle=false;
fillBoard(board);
showBoard(board);
while(!gameOver(board))
{
getChoice(board,playerToggle);
showBoard(board);
playerToggle=!playerToggle;
}
return 1;
}
void fillBoard(char board[][3])
{
for(int i=0;i<ROWS;i++)
for(int j=0;j<COLS;j++)
board[i][j]='*';
}
void showBoard(char board[][3])
{
cout<<" 1 2 3"<<endl;
for(int i=0;i<ROWS;i++)
{
cout<<(i+1)<<" ";
for(int j=0;j<COLS;j++)
{
cout<<board[i][j]<<" ";
}
cout<<endl;
}
}
bool gameOver(char board[][3])
{
bool win=false;
for(int i=0;i<3;i++)
{
if(board[i][0]=='X' &&board[i][1]=='X' && board[i][2]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
if(board[0][i]=='X' &&board[1][i]=='X' && board[2][i]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
}
if(board[0][0]=='X' && board[1][1]=='X' && board[2][2]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
if(board[0][2]=='X' && board[1][1]=='X' && board[2][0]=='X')
{
cout<<"\nPlayer 1 Wins!"<<endl;
win=true;
return win;
}
for(int i=0;i<3;i++)
{
if(board[i][0]=='O' &&board[i][1]=='O' && board[i][2]=='O')
{
cout<<"Computer Wins!"<<endl;
win=true;
return win;
}
if(board[0][i]=='O' &&board[1][i]=='O' && board[2][i]=='O')
{
cout<<"Computer Wins!"<<endl;
win=true;
return win;
}
}
if(board[0][0]=='O' && board[1][1]=='O' && board[2][2]=='O')
{
cout<<"Computer Wins!"<<endl;
win=true;
return win;
}
if(board[0][2]=='O' && board[1][1]=='O' && board[2][0]=='O')
{
cout<<"Computer Wins!"<<endl;
win=true;
return win;
}
for(int i=0;i<ROWS;i++)
{
for(int j=0;j<COLS;j++)
{
if(board[i][j]=='*')
return win;
}
}
cout<<"Tie!"<<endl;
return true;
}
void find_winning_position (char noughtorcross, int &row, int &col,char board[][3])
{
// check if specified character (nought or cross) can win along any row
int i, j, chcount, emptycol, emptyrow;
// Loop through rows
for (i = 0; i < 3; i ++)
{
// Chcount -number of either O or X along the row
chcount = 0;
emptycol = -1;
// Loop through columns
for (j = 0; j < 3; j ++)
{
// If the specified player is occupying the cell, add to chcount
if (board[i][j] == noughtorcross)
chcount ++;
// If specified cell is blank mark the column as empty
else if (board[i][j] == '*')
emptycol = j;
}
// If there are two of the specified player in the row and there is an
// empty cell, then the empty cell is the winning position
if (chcount == 2 && emptycol != -1)
{
row = i;
col = emptycol;
return;
}
}
// The same logic as above applies for columns
// check if specified character can win along any column
for (j = 0; j < 3; j ++)
{
chcount = 0;
emptyrow = -1;
for (i = 0; i < 3; i ++)
{
if (board[i][j] == noughtorcross)
chcount ++;
else if (board[i][j] == '*')
emptyrow = i;
}
if (chcount == 2 && emptyrow != -1)
{
row = emptyrow;
col = j;
return;
}
}
// Check if specified character can win along diagonal top-left to bottom-right
chcount = 0;
emptyrow = -1;
emptycol = -1;
// Loop through the diagonal
for (i = 0; i < 3; i ++)
{
if (board[i][i] == noughtorcross)
chcount ++;
else if (board[i][i] == '*')
emptyrow = emptycol = i;
}
if (chcount == 2 && emptyrow != -1 && emptycol != -1)
{
row = emptyrow;
col = emptycol;
return;
}
// Check if specified character can win along diagonal top-right to bottom-left
chcount = 0;
emptyrow = -1;
emptycol = -1;
// Loop through the diagonal
for (i = 0; i < 3; i ++)
{
if (board[i][2-i] == noughtorcross)
chcount ++;
else if (board[i][2-i] == '*')
{
emptyrow = i;
emptycol = 2 - i;
}
}
if (chcount == 2 && emptyrow != -1 && emptycol != -1)
{
row = emptyrow;
col = emptycol;
return;
}
}
void getChoice(char board[][3],bool playerToggle)
{
char symbol;
int player;
int row,col;
if(playerToggle)
{
cout<<"Computer's Turn"<<endl;
char ai_char='O';
char player_char='X';
player=2;
// Check if AI can win in this move
int row=-1, col=-1;
// See if AI can win in this move
find_winning_position ('O', row, col,board);
// if AI can win, play the winning move
if (row != -1 && col != -1)
{
board[row][col] = ai_char;
return;
}
row = col = -1;
// see if player can win next move and block
// if possible
find_winning_position (player_char, row, col,board);
if (row != -1 && col != -1)
{
board[row][col] = ai_char;
return;
}
// check if the middle can be played
if (board[1][1] == ' ')
{
board[1][1] = ai_char;
return;
}
//Corner positions
int corners[4][2] = {{0, 0}, {0, 2}, {2, 0}, {2, 2}};
// If any one or more corners are blank
if (board[0][0] == '*' || board[0][2] == '*' || board[2][0] == '*' || board[2][2] == '*')
{
// randomly select corner
while (1)
{
int corner = rand () % 4;
row = corners[corner][0];
col = corners[corner][1];
if (board[row][col] == '*')
{
board[row][col] = ai_char;
return;
}
}
}
// Edge positions
int edges[4][2] = {{0, 1}, {1, 0}, {1, 2}, {2, 1}};
// if any one or more edges are blank
if (board[0][1] == '*' || board[1][0] == '*' || board[1][2] == '*' || board[2][1] == '*')
{
// randomly select edge
while (1)
{
int edge = rand () % 4;
row = edges[edge][0];
col = edges[edge][1];
if (board[row][col] == '*')
{
board[row][col] = ai_char;
return;
}
}
}
}
else
{
symbol='X';
player=1;
while(true)
{
while(true)
{
cout<<"Player 1 Row: ";
cin>>row;
if(row>=1 && row<=3)
break;
}
while(true)
{
cout<<"Player 1 Column: ";
cin>>col;
if(col>=1 && col<=3)
break;
}
if(board[row-1][col-1]=='*')
{
board[row-1][col-1]=symbol;
break;
}
else
cout<<endl;
}
}
}
output
If you have any query
regarding the code please ask me in the comment i am here for help
you. Please do not direct thumbs down just ask if you have any
query. And if you like my work then please appreciates with up
vote. Thank You.
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