do-while循环不会退出C语言

Question

好的，我很抱歉，我知道有一千个do-while循环如何工作以及如何退出它们的例子。我发誓，我已经尝试过所有这些。对于我的生活，当用户输入0时，我无法退出。必须有一些我过度看的东西。我是如何让一个人在其他if循环中工作，但主要的是超出我。我很感激任何帮助或指导。

int main()
{
    char connectBoard[6][7];
    int i , j;
    char c;
    int turn = 1;
    char player1 = 'x';
    char player2 = 'o';
    int spot;

    for( i = 0; i < 6; i++) //sets up 2D array board
    {
        for( j = 0; j < 7; j++)
        {
            c = '.';
            connectBoard[i][j] = c;
        }
    }
    for( i = 0; i < 6; i++)// prints out 2D array board
    {
        for( j = 0; j < 7; j++)
        {
            printf("%c", connectBoard[i][j]);
        }
        printf("\n");
    }
    printf("=======\n");
    printf("1234567\n");

    do{
        if( turn%2 != 0 ) //player1 turn
        {
            for( i = 5; i < 6; i++)
            {
                for(j = 0; j < 1; j++)
                {
                    printf(" Player %c, drop your piece in which column (1-7 or 0 to quit): ", player1);
                    scanf("%d", &spot);
                    j = spot - 1;
                    if( connectBoard[i][j] == '.' )
                    {
                        connectBoard[i][j] = 'x';
                    }
                    else if( connectBoard[i][j] == 'x' || connectBoard[i][j] == 'o' )
                    {
                        do
                        {
                            i--;
                        }while(connectBoard[i][j] == 'x' || connectBoard[i][j] == 'o');
                        connectBoard[i][j] = 'x';
                        if( i == -1 )
                        {
                            printf("***Bad entry, try again: ");
                            scanf("%d", &spot);
                            j = spot - 1;
                            i = 5;
                            connectBoard[i][j] = 'x';
                        }
                    }
                    turn++;
                }
                break;
            }
            printf("\n");
            for( i = 0; i < 6; i++)// prints out 2D array board
            {
                for( j = 0; j < 7; j++)
                {
                    printf("%c", connectBoard[i][j]);
                }
                printf("\n");
            }
            printf("=======\n");
            printf("1234567\n");
        }
        if( turn%2 == 0 ) //player2 turn
        {
            for( i = 5; i < 6; i++)
            {
                for(j = 0; j < 1; j++)
                {
                    printf(" Player %c, drop your piece in which column (1-7 or 0 to quit): ", player2);
                    scanf("%d", &spot);
                    j = spot - 1;
                    if( connectBoard[i][j] == '.' )
                    {
                        connectBoard[i][j] = 'o';
                    }
                    else if( connectBoard[i][j] == 'x' || connectBoard[i][j] == 'o' )
                    {
                        do
                        {
                            i--;
                        }while(connectBoard[i][j] == 'x' || connectBoard[i][j] == 'o');
                        connectBoard[i][j] = 'o';
                        if( i == -1)
                        {
                            printf("***Bad entry, try again: ");
                            scanf("%d", &spot);
                            j = spot - 1;
                            i = 5;
                            connectBoard[i][j] = 'o';
                        }
                    }
                    turn++;
                }
                break;
            }
            printf("\n");
            for( i = 0; i < 6; i++)// prints out 2D array board
            {
                for( j = 0; j < 7; j++)
                {
                    printf("%c", connectBoard[i][j]);
                }
                printf("\n");
            }
            printf("=======\n");
            printf("1234567\n");
        }

    }while( spot != 0 );




    return 0;
}

Answer 1

读取点变量后，您可以检查值是否为0并且中断：

   printf(" Player %c, drop your piece in which column (1-7 or 0 to quit): ", player2);
   scanf("%d", &spot);
   if (spot == 0)
     return 1;
   j = spot - 1;

并将while do改为while循环以避免混淆。

Answer 2

仅对该循环使用变量。你在循环中使用spot来做其他事情，仅用于暂时目的。

然后，你知道do / while和while之间的差异吗？我不太了解你的程序，但如果你正在阅读一个点，你可以在开始和循环外读取它，然后用while循环检查它。它一样，但也许对你来说更容易。

Answer 3

为什么在while循环中使用spot。根据C语言，它存储垃圾值。

即使您使用，也请不要为其设置值。请检查基本的C变量声明。