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)并将正确的棋子放入棋盘中。数字表示一系列连续的空格,/表示新行。字母代表董事会单元格中的船(二维数组)。
当我运行它时,它会弹出外部 SIGSEGV 并向我显示程序集代码,上面写着 00403D61 833a00 cmpl $0x0,(%edx)
有谁知道它有什么问题以及如何解决它?
Procedure LoadGame(FileName : String; Var Board : TBoard);
Var
Line : String;
CurrentFile : Text;
Row , count : Integer;
column, counter: Integer;
Begin
AssignFile(CurrentFile, FileName);
Reset(CurrentFile);
Readln(CurrentFile, Line);
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;
在使用
变量之前,您尚未初始化变量row
和column
。 您必须这样做,因为因为它们是局部变量(在堆栈上),因此在调用 LoadGame 时它们将包含随机值。 请参阅下面的更改/建议。 我还没有调试你的代码,这是由你做的。
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;