次のコードを実行しようとすると、Xcode はリンカー エラーがあると表示します。何が問題ですか？
エラー：
アーキテクチャ x86_64 の未定義シンボル: 「player1IsWinnerIf()」、参照元: main.o の _main 「player2IsWinnerIf()」、参照元: main.o の _main
ld: アーキテクチャ x86_64 のシンボルが見つかりませんでした。
コード：
#include <iostream>
using namespace std;
const int numRow = 3;
const int numColumn = 3;
const char blank = ' ';
class position
{
public:
position();
//Postcondition
void positionPlacement()const;
private:
char board[3][3];
};
void InitializeBoard(char board[][numColumn], int R, int C);
void DisplayBoard(char board[][numColumn], int R);
void positionPlacementPlayer1();
void positionPlacementPlayer2();
char player1IsWinnerIf();
char player2IsWinnerIf();
int positionOption = 0;
int main()
{
char board[numRow][numColumn];
int Row = 3;
int Column = 3;
char response = 'Y';
while(response == 'Y' || response == 'y')
{
InitializeBoard(board, Row, Column);
DisplayBoard(board, Row);
do
{
//player 1 turn
positionPlacementPlayer1();
DisplayBoard(board, Row);
player1IsWinnerIf();
//player 2 turn
positionPlacementPlayer2();
DisplayBoard(board, Row);
player2IsWinnerIf();
}
while (player1IsWinnerIf() != '1' || player2IsWinnerIf() != '1');
if(player1IsWinnerIf() == '1')
{
DisplayBoard(board, Row);
cout<<"Player one is the winner!"<<endl;
cout<<"Would you like to play again?"<<endl;
cin>>response;
}
else if(player2IsWinnerIf() == '1')
{
DisplayBoard(board, Row);
cout<<"Player two is the winner!"<<endl;
cout<<"Would you like to play again?"<<endl;
cin>>response;
}
else
{
DisplayBoard(board, Row);
cout<<"Draw. Neither player won."<<endl;
cout<<"Would you like to play again?"<<endl;
cin>>response;
}
}
return 0;
}
void InitializeBoard(char board[][numColumn], int R, int C)
{
int row, column;
for (row = 0; row<R; row++)
for(column = 0; column<C; column++)
board[row][column] = blank;
}
void DisplayBoard(char board[][numColumn], int R)
{
int row;
cout<<"This is a TicTacToe Board."<<endl;
for (row = 0; row<R; row++)
{
cout<<' '<<board[row][0]<<'|'<<board[row][1]<<'|'<<board[row][2]<<endl;
cout<<"-------"<<endl;
}
}
char board[3][3];
void positionPlacementPlayer1()
//doesn't need a variable in () because it asks for one below
{
cout<<"Player 1 (X), please choose an available position (1-9). For example, if you would like
the top middle, you would enter '2', if you wanted the bottom left, you would enter '7',
and so on and so forth.";
cin>>positionOption;
switch(positionOption)
{
case '1': board[0][0] = 'X';
break;
case '2': board[0][1] = 'X';
break;
case '3': board[0][2] = 'X';
break;
case '4': board[1][0] = 'X';
break;
case '5': board[1][1] = 'X';
break;
case '6': board[1][2] = 'X';
break;
case '7': board[2][0] = 'X';
break;
case '8': board[2][1] = 'X';
break;
case '9': board[2][2] = 'X';
break;
default:
cout<<"This is not a valid position."<<endl;
}
}
void positionPlacementPlayer2()
{
cout<<"Player 2 (O), please choose an available position (1-9). For example, if you would like
the top middle, you would enter '2', if you wanted the bottom left, you would enter '7', and so
on and so forth.";
cin>>positionOption;
switch(positionOption)
{
case '1': board[0][0] = 'O';
break;
case '2': board[0][1] = 'O';
break;
case '3': board[0][2] = 'O';
break;
case '4': board[1][0] = 'O';
break;
case '5': board[1][1] = 'O';
break;
case '6': board[1][2] = 'O';
break;
case '7': board[2][0] = 'O';
break;
case '8': board[2][1] = 'O';
break;
case '9': board[2][2] = 'O';
break;
default:
cout<<"This is not a valid position."<<endl;
}
}
char Player1IsWinnerIf()
{
//player 1 can only be the winner if they have a full row of X, full column of X, or a full
//diagonal of X
if(board[0][0]=='X' && board[0][1]=='X' && board && board[0][2]=='X')
//row 0
return 1;
else if(board[1][0]=='X' && board[1][1]=='X' && board[1][2]=='X')
//row 1
return 1;
else if(board[2][0]=='X' && board[2][1]=='X' && board[2][2]=='X')
//row 2
return 1;
else if(board[0][0]=='X' && board[1][0]=='X' && board[2][0]=='X')
//column 0
return 1;
else if(board[0][1]=='X' && board[1][1]=='X' && board[2][1]=='X')
//column 1
return 1;
else if(board[0][2]=='X' && board[1][2]=='X' && board[2][2]=='X')
//column 2
return 1;
else if(board[0][0]=='X' && board[1][1]=='X' && board[2][2]=='X')
//diagonal
return 1;
else if(board[0][2]=='X' && board[1][1]=='X' && board[2][0]=='X')
//diagonal
return 1;
else
return -1;
}
char Player2IsWinnerIf()
{
//player 2 can only be the winner if they have a full row of O, full column of O, or a full
//diagonal of O
if(board[0][0]=='O' && board[0][1]=='O' && board[0][2]=='O')
//row 0
return 1;
else if(board[1][0]=='O' && board[1][1]=='O' && board[1][2]=='O')
//row 1
return 1;
else if(board[2][0]=='O' && board[2][1]=='O' && board[2][2]=='O')
//row 2
return 1;
else if(board[0][0]=='O' && board[1][0]=='O' && board[2][0]=='O')
//column 0
return 1;
else if(board[0][1]=='O' && board[1][1]=='O' && board[2][1]=='O')
//column 1
return 1;
else if(board[0][2]=='O' && board[1][2]=='O' && board[2][2]=='O')
//column 2
return 1;
else if(board[0][0]=='O' && board[1][1]=='O' && board[2][2]=='O')
//diagonal
return 1;
else if(board[0][2]=='O' && board[1][1]=='O' && board[2][0]=='O')
//diagonal
return 1;
else
return -1;
}
//switch(toupper(CINANSWER[0])