无法弄清楚为什么我的程序在条件不为真时执行 if 语句(数组)
Can't figure out why my program is executing a if statement when the condition is not true (arrays)
我正在尝试解决我正在阅读的这本书中的练习题,以自学 C++。
该问题要求创建一个 tic tac toe 游戏,两个人可以玩,使用 enum
表示棋盘上的值(本章讨论了枚举器).
这是我到目前为止编写的代码,一切似乎都运行良好,除了每当我输入第 1 行第 3 列时,当轮到玩家 X 时,这会导致它结束游戏并询问是否游戏还没结束再玩还是不玩
我似乎不明白为什么,因为它只有这个坐标,而且只有在 X 玩家的回合中。
要使用该程序,您首先输入行号,然后输入列号。
我也知道你可以覆盖板上的一个地方,我只是假设你现在不会。
如果有人能帮我指出这个错误那就太好了,我的代码可能读起来很混乱,很抱歉,但我仍在练习并且对编程还很陌生。
我非常乐意解释一行代码应该做什么!。
代码如下:
#include<iostream>
#include<array>
enum TicTacToeSquare
{
blankSquare=0,
X=1,
O=2
};
int turn=0;
using namespace std;
int winCondition(int a[3][3]);
void printBoard(int a[3][3]);
void resetBoard(int a[3][3]);
int testBoard(int a[3][3]);
int main()
{
int choice;
int board[3][3]=
{
{0,0,0},
{0,0,0},
{0,0,0}
};
int i,j;
while (true)
{
for (turn=0;turn<9;++turn)
{
if (turn%2==0)
{
std::cout<<"Player X: \n"<<"Enter board position: \n";
std::cin>>i>>j;
std::cout<<std::endl;
board[i-1][j-1]=X;
printBoard(board);
if (winCondition(board)==1)
{
int choice;
cout<<"\nDo you want to play again?"<<endl;
cout<<"1. Yes\n"<<"2. No"<<endl;
cin>>choice;
if (choice==1)
{
resetBoard(board);
std::cout<<std::endl;
printBoard(board);
turn=0;
}
else if (choice==2)
{
cout<<"\nThanks for playing!"<<endl;
return 0;
}
else
{
cout<<"\nInvalid option, game will terminate."<<endl;
return 0;
}
}
}
if (turn%2!=0)
{
std::cout<<"Player O: \n"<<"Enter board position: \n";
std::cin>>i>>j;
std::cout<<std::endl;
board[i-1][j-1]=O;
printBoard(board);
if (winCondition(board)==2)
{
int choice;
cout<<"\nDo you want to play again?"<<endl;
cout<<"1. Yes\n"<<"2. No"<<endl;
cin>>choice;
if (choice==1)
{
resetBoard(board);
std::cout<<std::endl;
printBoard(board);
turn=0;
}
else if (choice==2)
{
cout<<"\nThanks for playing!"<<endl;
return 0;
}
else
{
cout<<"\nInvalid option, game will now terminate."<<endl;
return 0;
}
}
}
}
std::cout<<"Game is a draw!"<<std::endl;
std::cout<<"Do you want to play again?"<<std::endl;
std::cin>>choice;
if (choice==1)
{
resetBoard(board);
std::cout<<std::endl;
printBoard(board);
}
else if (choice==2)
{
cout<<"\nThanks for playing!"<<std::endl;
return 0;
}
else
{
cout<<"Invalid option, game will now terminate."<<endl;
return 0;
}
}
}
void printBoard(int board[3][3])
{
for (int i=1;i<4;++i)
{
for (int j=1;j<4;++j)
{
cout<<board[i-1][j-1]<<" ";
if (j%3==0)
{
cout<<"\n";
}
}
}
}
int winCondition(int board[3][3])
{
if (board[0][0]==X&&board[0][1]==X&&board[0][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][0]==O&&board[0][1]==O&&board[0][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][0]==X&&board[1][0]==X&&board[2][0]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][0]==O&&board[1][0]==O&&board[2][0]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][1]==X&&board[1][1]==X&&board[2][1]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][1]==O&&board[1][1]==O&&board[2][1]==O)
{
cout<<"\Player O wins!"<<std::endl;
return 2;
}
else if (board[0][2]==X&&board[1][2]==X&&board[2][2]==X)
{
cout<<"Player X wins!"<<std::endl;
return 1;
}
else if (board[0][2]==O&&board[1][2]==O&&board[2][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[1][0]==X&&board[1][1]==X&&board[1][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[1][0]==O&&board[1][1]==O&&board[1][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[2][0]==X&&board[2][1]==X&&board[2][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[2][0]==O&&board[2][1]==O&&board[2][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][0]==X&&board[1][1]==X&&board[2][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][0]==O&&board[1][2]==O&&board[2][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][2]==X&&board[1][1]==X&&board[2][0]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][2]==O&&board[1][1]==O&&board[2][0]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
}
void resetBoard(int board[3][3])
{
for (int i=0;i<3;++i)
{
for (int j=0;j<3;++j)
{
board[i][j]=blankSquare;
}
}
}
在 winCondition
中,如果没有人获胜,则您没有明确的 return。这会导致未定义的行为,这意味着可以 returned 任何值。您需要在函数末尾添加一个return 0;
。
如果您在启用所有警告的情况下进行编译,编译器会告诉您类似的问题。
我正在尝试解决我正在阅读的这本书中的练习题,以自学 C++。
该问题要求创建一个 tic tac toe 游戏,两个人可以玩,使用 enum
表示棋盘上的值(本章讨论了枚举器).
这是我到目前为止编写的代码,一切似乎都运行良好,除了每当我输入第 1 行第 3 列时,当轮到玩家 X 时,这会导致它结束游戏并询问是否游戏还没结束再玩还是不玩
我似乎不明白为什么,因为它只有这个坐标,而且只有在 X 玩家的回合中。
要使用该程序,您首先输入行号,然后输入列号。
我也知道你可以覆盖板上的一个地方,我只是假设你现在不会。
如果有人能帮我指出这个错误那就太好了,我的代码可能读起来很混乱,很抱歉,但我仍在练习并且对编程还很陌生。
我非常乐意解释一行代码应该做什么!。
代码如下:
#include<iostream>
#include<array>
enum TicTacToeSquare
{
blankSquare=0,
X=1,
O=2
};
int turn=0;
using namespace std;
int winCondition(int a[3][3]);
void printBoard(int a[3][3]);
void resetBoard(int a[3][3]);
int testBoard(int a[3][3]);
int main()
{
int choice;
int board[3][3]=
{
{0,0,0},
{0,0,0},
{0,0,0}
};
int i,j;
while (true)
{
for (turn=0;turn<9;++turn)
{
if (turn%2==0)
{
std::cout<<"Player X: \n"<<"Enter board position: \n";
std::cin>>i>>j;
std::cout<<std::endl;
board[i-1][j-1]=X;
printBoard(board);
if (winCondition(board)==1)
{
int choice;
cout<<"\nDo you want to play again?"<<endl;
cout<<"1. Yes\n"<<"2. No"<<endl;
cin>>choice;
if (choice==1)
{
resetBoard(board);
std::cout<<std::endl;
printBoard(board);
turn=0;
}
else if (choice==2)
{
cout<<"\nThanks for playing!"<<endl;
return 0;
}
else
{
cout<<"\nInvalid option, game will terminate."<<endl;
return 0;
}
}
}
if (turn%2!=0)
{
std::cout<<"Player O: \n"<<"Enter board position: \n";
std::cin>>i>>j;
std::cout<<std::endl;
board[i-1][j-1]=O;
printBoard(board);
if (winCondition(board)==2)
{
int choice;
cout<<"\nDo you want to play again?"<<endl;
cout<<"1. Yes\n"<<"2. No"<<endl;
cin>>choice;
if (choice==1)
{
resetBoard(board);
std::cout<<std::endl;
printBoard(board);
turn=0;
}
else if (choice==2)
{
cout<<"\nThanks for playing!"<<endl;
return 0;
}
else
{
cout<<"\nInvalid option, game will now terminate."<<endl;
return 0;
}
}
}
}
std::cout<<"Game is a draw!"<<std::endl;
std::cout<<"Do you want to play again?"<<std::endl;
std::cin>>choice;
if (choice==1)
{
resetBoard(board);
std::cout<<std::endl;
printBoard(board);
}
else if (choice==2)
{
cout<<"\nThanks for playing!"<<std::endl;
return 0;
}
else
{
cout<<"Invalid option, game will now terminate."<<endl;
return 0;
}
}
}
void printBoard(int board[3][3])
{
for (int i=1;i<4;++i)
{
for (int j=1;j<4;++j)
{
cout<<board[i-1][j-1]<<" ";
if (j%3==0)
{
cout<<"\n";
}
}
}
}
int winCondition(int board[3][3])
{
if (board[0][0]==X&&board[0][1]==X&&board[0][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][0]==O&&board[0][1]==O&&board[0][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][0]==X&&board[1][0]==X&&board[2][0]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][0]==O&&board[1][0]==O&&board[2][0]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][1]==X&&board[1][1]==X&&board[2][1]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][1]==O&&board[1][1]==O&&board[2][1]==O)
{
cout<<"\Player O wins!"<<std::endl;
return 2;
}
else if (board[0][2]==X&&board[1][2]==X&&board[2][2]==X)
{
cout<<"Player X wins!"<<std::endl;
return 1;
}
else if (board[0][2]==O&&board[1][2]==O&&board[2][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[1][0]==X&&board[1][1]==X&&board[1][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[1][0]==O&&board[1][1]==O&&board[1][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[2][0]==X&&board[2][1]==X&&board[2][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[2][0]==O&&board[2][1]==O&&board[2][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][0]==X&&board[1][1]==X&&board[2][2]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][0]==O&&board[1][2]==O&&board[2][2]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
else if (board[0][2]==X&&board[1][1]==X&&board[2][0]==X)
{
cout<<"\nPlayer X wins!"<<std::endl;
return 1;
}
else if (board[0][2]==O&&board[1][1]==O&&board[2][0]==O)
{
cout<<"\nPlayer O wins!"<<std::endl;
return 2;
}
}
void resetBoard(int board[3][3])
{
for (int i=0;i<3;++i)
{
for (int j=0;j<3;++j)
{
board[i][j]=blankSquare;
}
}
}
在 winCondition
中,如果没有人获胜,则您没有明确的 return。这会导致未定义的行为,这意味着可以 returned 任何值。您需要在函数末尾添加一个return 0;
。
如果您在启用所有警告的情况下进行编译,编译器会告诉您类似的问题。