閱讀二維數組並顯示它（C++）

Question

所以我的代碼的前提是從.txt讀取二維數組。陣列是一個遊戲板，但前兩行是決定棋盤大小的線。當我讀到它後，我希望它找到字符「U」的位置，然後顯示數組，但只顯示U和它周圍的內容。問題是我不能讓陣列打印正確的大小和顯示U的代碼也不工作。

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 

Answer 1

你忘了在txt中讀新行符號。如果你看看gameBoard數組，你會發現第二行的第一項是10''。

修改後的代碼：

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 
}