就一个button事件
procedure TForm1.btn7Click(Sender: TObject);
Type
TMyArr = array of array of array of Integer; {定义一个三维动态数组类型}
Pint = ^TMyArr;
var
PArr: Pint; {动态数组指针变量}
i,j,k,ic,jc,kc: Integer;
begin
Memo1.Lines.Clear;
{用作维数的变量}
ic := 2;
jc := 3;
kc := 4;
{分配内存; 按说动态数组还需要 8 个管理字节, 我不知道 Delphi 是怎么协调的}
GetMem(PArr, ic * jc * kc * SizeOf(Integer));
{设置数组}
SetLength(PArr^, ic,jc,kc);
{赋值}
for i := 0 to ic - 1 do
for j := 0 to jc - 1 do
for k := 0 to kc - 1 do
PArr^[i][j][k] := Random(100);
{取值}
Memo1.Clear;
for i := 0 to ic - 1 do
for j := 0 to jc - 1 do
for k := 0 to kc - 1 do
Memo1.Lines.Add(Format('Arr[%d][%d][%d] = %d', [i, j, k, PArr^[i][j][k]]));
//Memo1.Lines.Add(Format('Arr[%d][%d][%d] = %d', [i, j, k, TMyArr(PArr)[i][j][k]]));
{按理说这种访问方法也对,可是这中方法在编译的时候能通的过去,在运行的就报错了}
{自己分配的内存要负责释放}
FreeMem(PArr);
end;
到setlength那个地方就出错,大家看看是怎么回事
procedure TForm1.btn7Click(Sender: TObject);
Type
TMyArr = array of array of array of Integer; {定义一个三维动态数组类型}
Pint = ^TMyArr;
var
PArr: Pint; {动态数组指针变量}
i,j,k,ic,jc,kc: Integer;
begin
Memo1.Lines.Clear;
{用作维数的变量}
ic := 2;
jc := 3;
kc := 4;
{分配内存; 按说动态数组还需要 8 个管理字节, 我不知道 Delphi 是怎么协调的}
GetMem(PArr, ic * jc * kc * SizeOf(Integer));
{设置数组}
SetLength(PArr^, ic,jc,kc);
{赋值}
for i := 0 to ic - 1 do
for j := 0 to jc - 1 do
for k := 0 to kc - 1 do
PArr^[i][j][k] := Random(100);
{取值}
Memo1.Clear;
for i := 0 to ic - 1 do
for j := 0 to jc - 1 do
for k := 0 to kc - 1 do
Memo1.Lines.Add(Format('Arr[%d][%d][%d] = %d', [i, j, k, PArr^[i][j][k]]));
//Memo1.Lines.Add(Format('Arr[%d][%d][%d] = %d', [i, j, k, TMyArr(PArr)[i][j][k]]));
{按理说这种访问方法也对,可是这中方法在编译的时候能通的过去,在运行的就报错了}
{自己分配的内存要负责释放}
FreeMem(PArr);
end;
到setlength那个地方就出错,大家看看是怎么回事
SetLength(PArr^, ic,jc,kc);不就行了
{设置数组}
SetLength(PArr^, ic,jc,kc);//这里setlength 照样是分配内存,这样就和上面重复了。
去掉任意1个~~~~~~~~~
Type
TMyArr = array of array of array of Integer; {定义一个三维动态数组类型}
var
Arr:TMyArr;
ic,jc,kc: Integer;
begin
ic := 2;
jc := 3;
kc := 4;
SetLength(Arr, ic,jc,kc);
end;
procedure TForm1.Button1Click(Sender: TObject);
Type
TMyArr = array of array of array of Integer; {定义一个三维动态数组类型}
var
Arr:TMyArr;
i,j,k,ic,jc,kc: Integer;
begin
Memo1.Lines.Clear;
{用作维数的变量}
ic := 2;
jc := 3;
kc := 4; {设置数组}
SetLength(arr, ic,jc,kc);
{赋值}
for i := 0 to ic - 1 do
for j := 0 to jc - 1 do
for k := 0 to kc - 1 do
arr[i][j][k] := Random(100);
{取值}
Memo1.Clear;
for i := 0 to ic - 1 do
for j := 0 to jc - 1 do
for k := 0 to kc - 1 do
Memo1.Lines.Add(Format('Arr[%d][%d][%d] = %d', [i, j, k, arr[i][j][k]]));end;
http://www.cnblogs.com/del/archive/2008/03/27/1125778.html