尝试搜索数组的值并在找到时更改值

Question

我刚刚开始 c 编程语言，并正在尝试创建井字游戏。 我在互联网上找到了很多我一直在关注和修改的信息和教程。 目前我有教程中的代码，可以根据用户选择的方块更新网格。 但我想把它改成循环。 但是，我无法使循环正常工作。 我错过了什么或做错了什么......或者它甚至可以这样做。 这是我的代码：

        if(player % 2)
        {
            player = 1; 
        }
        else
        {
            player = 2;
        }
             

    printf("Please enter the number of the square to place your marker  ");
    

    printf("Player %d : ", player);
    scanf("%d", &move);

    if(player == 1)//get the right marker
    {
        marker = 'O';
    }
    else
    {
        marker = 'X';
    }
    
    
    if  (move == 1 && grid_sq[0] == '1')
    {
            grid_sq[0] = marker;
    }
        
    else if (move == 2 && grid_sq[1] == '2')
    {
        
            grid_sq[1] = marker;
    }
        
    else if (move == 3 && grid_sq[2] == '3')
    {
            grid_sq[2] = marker;
    }
        
    else if (move == 4 && grid_sq[3] == '4')
    {
            grid_sq[3] = marker;
    }
    else if (move == 5 && grid_sq[4] == '5')
    {
            grid_sq[4] = marker;
    }
    else if (move == 6 && grid_sq[5] == '6')
    {
            grid_sq[5] = marker;
    }
    else if (move == 7 && grid_sq[6] == '7')
    {
            grid_sq[6] = marker;
    }
        
    else if (move == 8 && grid_sq[7] == '8')
    {
            grid_sq[7] = marker;
    }
        
    else if (move == 9 && grid_sq[8] == '9')
    {
            grid_sq[8] = marker;
    }
    else
    {
        printf("\t\t\tMove is not valid! Try again. ");
        getch();
    }

我想把它变成一个循环，我一直在尝试的循环是：

for (i=0; 1<9; i++)
{
    if(grid_sq[i]==move)
    {
        grid_sq[i]=marker
    }
}

Answer 1

您的for循环条件中有错字， 1<9应该是i<9 。

但是不需要所有这些if语句或循环。 您可以将move转换为数组索引。

if (move >= 1 && move <= 9) {
    if (grid_sq[move-1] == move + '0') {
        grid_sq[move-1] = marker;
    } else {
        printf("That square is already taken, try again\n");
        getch();
    }
} else {
    printf("Square must be between 1 and 9, try again\n");
    getch();
}