以下代码使用保存在文本文件中的游戏,格式为0 / 8B1 / 8B1 / 8B1 / 1P6B1 / 1P8 / 7S2 / 7S2 / 1AAAAA1S2 / 5DDD2
(例如)并将正确的部分放入板中。数字表示一系列连续的空格,/表示新的行。字母代表董事会那个单元格中的船(二维数组)。
当我运行它时,它带有EXTERNAL SIGSEGV并显示汇编代码00403D61 833a00 cmpl $ 0x0,(%edx)
有谁知道它有什么问题以及如何解决它?
<table id="myTable">
<tr>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
</tr>
<tr>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
</tr>
<tr>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
</tr>
<tr>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
<td contentEditable="true"></td>
</tr>
</table>
答案 0 :(得分:1)
在使用变量之前,您尚未初始化变量row
和column
。您必须这样做,因为它们是局部变量(在堆栈上),它们将在调用LoadGame时包含随机值。请参阅下面的更改/建议。我没有调试你的代码,这是你要做的。
Procedure LoadGame(FileName : String; Var Board : TBoard);
Var
Line : String;
CurrentFile : Text;
Row , count : Integer;
column, counter: Integer;
Begin
// Ideally, you should initialise each cell of the board with some value not used in the following so you can easily verify the effect of the loading operation
AssignFile(CurrentFile, FileName);
Reset(CurrentFile);
Readln(CurrentFile, Line);
// initialise Row and Column
Row := 0; // assuming the cells are zero-based
Column := 0; // ditto
for counter := 1 to length(line) do
begin
if (Line[counter] in ['A'..'Z','m','h']) then
begin
board[row,column]:=line[counter];
column:=column+1;
end
else
if line[counter]='0' then
begin
for column := 0 to 9 do
begin
board[row,column]:='-';
end;
end
else If line[counter]='/' then
begin
row :=row+1;
column:=0;
end
else for count := 0 to (strtoint(line[counter])-1) do
begin
Board[row,column+count] :='-';
column:=column+1;
end;
end;
CloseFile(CurrentFile);
End;