to C_Sharp:这个我当然知道,但调试的时候为什么显示是递减呢?
to chechy:thank you,数字是随机的,但你有没有发现:
不知道各位调试的时候有没有发现:当执行 for i := 1 to MaxSize do这句时,i是从maxsize 到 1逐渐递减循环的,而且当执行 GlobalArray[MaxSize] := GetNextNumber时往往得出的是GlobalArray[1]的值,很奇怪,应该递增才对,why?
var
NextNumber: Integer = 0;
DoneFlags: Integer = 0;
GlobalArray: array[1..MaxSize] of Integer;
function GetNextNumber: Integer;
begin
Result := NextNumber; // return global var
Inc(NextNumber); // inc global var
end;
procedure TFooThread.Execute;
var
i: Integer;
begin
OnTerminate := MainForm.ThreadsDone;
for i := 1 to MaxSize do
begin
GlobalArray[i] := GetNextNumber; // set array element
Sleep(5); // let thread intertwine
end;
end;
procedure TMainForm.ThreadsDone(Sender: TObject);
var
i: Integer;
begin
Inc(DoneFlags);
if DoneFlags = 2 then // make sure both threads finished
for i := 1 to MaxSize do
{ fill listbox with array contents }
Listbox1.Items.Add(IntToStr(GlobalArray[i]));
end;
procedure TMainForm.Button1Click(Sender: TObject);
begin
TFooThread.Create(False); // create threads
TFooThread.Create(False);
end;