读取2d数组并显示它(c++)

Reading in a 2d array and displaying it (c++)

本文关键字：c++ 显示 2d 数组 读取      更新时间：2023-10-16

所以我的代码的前提是从。txt中读取2d数组。数组是一个游戏棋盘，但前两行决定了棋盘的大小。在我读到它之后，我希望它能找到字符"U"所在的地方，然后显示数组，但只显示U和它周围的东西。问题是我不能得到数组打印正确的大小和显示U的代码也不工作。

ifstream inputFile;
int boardSizeRow;
int boardSizeCol;
inputFile.open("C:\Users\Michael\Desktop\fileboard2.txt");
inputFile >> boardSizeRow;
inputFile >> boardSizeCol;
inputFile.get();

char gameBoard[20][20];
for (int row = 0; row < boardSizeRow; row++)
{
    for (int col = 0; col < boardSizeCol; col++)
    {
        gameBoard[row][col] = inputFile.get();
    }
}

for (int row = 0; row < boardSizeRow; row++) //////////////TO TEST PRINT
{
    for (int col = 0; col < boardSizeCol; col++)
    {
        cout << gameBoard[row][col];
    }
}
cout << endl;
cout << endl;
const int ROWS = 20; 
const int COLS = 20;
bool toPrint[ROWS][COLS] = {false}; 
for (int i = 0; i < ROWS; i++ )
{
    for (int j = 0; j < COLS; j++)
    {
       if (gameBoard[i][j] == 'U')
       {
            //set parameters around:
            toPrint[i][j] = true; 
            toPrint[i][j-1] = true; //West
            toPrint[i][j+1] = true; //East
            toPrint[i-1][j] = true;  //North
            toPrint[i+1][j] = true; //South
       }
   }
}
for (int i = 0; i < ROWS; i++ )
{
    for (int j = 0; j < COLS; j++)
    {
       if (toPrint[i][j])
       {            
           cout << gameBoard[i][j] ;
       }
       else
       {
           cout <<"0";
       }
    }
    cout <<endl;
 }
cout << endl; 
return 0;

。txt文件::

20
20
WWWWWWWWWWWWWWWWWWWW
  W GO  W          W
W WW      w    S   W
W H W   GW  w      W
WPW  WW          G W
 WK       W        W
W W W  W    w   w  W
  WK WU            W
    SW      w  w   W
           W       W
    w    W       G W
  G    W       w   W
D   wwwww          W
         K   w  D  W
w w   W w   w      W
    ww  w    WWWWWWW
  G        w       W
    ww  w S    w   W
   WWW      G      W
WWWWWWWWWWWWWWWWWWWW

您忘记在txt中读取新行符号。如果你查看gameBoard数组，你会发现第二行的第一项是10' '。

修改代码:

for (int row = 0; row < boardSizeRow; row++)
{
    for (int col = 0; col < boardSizeCol; col++)
    {
        gameBoard[row][col] = inputFile.get();
    }
    inputFile.get();//read new line symbol here
}

for (int row = 0; row < boardSizeRow; row++) 
{
    for (int col = 0; col < boardSizeCol; col++)
    {
        cout << gameBoard[row][col];
    }
    cout<<endl;//output new line here
}

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