typeTArr = array of TPoint; {把数组先定义成一个类型会方便许多, 这里仅用 TPoint 测试}{删除动态数组指定元素的过程: 参数 arr 是数组名, 参数 Index 是要删除的索引}procedure DeleteArrItem(var arr: TArr; Index: Integer);varCount: Cardinal;beginCount := Length(arr);if (Count = 0) or (Index < 0) or (Index >= Count) then Exit;Move(arr[Index+1], arr[Index], (Count-Index)* SizeOf(arr[0]));SetLength(arr, Count - 1);end;{测试}procedure TForm1.Button1Click(Sender: TObject);vararr: TArr;i: Integer;begin{测试数据}SetLength(arr, 5);arr[0].X := 1; arr[0].Y := 111;arr[1].X := 2; arr[1].Y := 222;arr[2].X := 3; arr[2].Y := 333;arr[3].X := 4; arr[3].Y := 444;arr[4].X := 5; arr[4].Y := 555;{删除第四个元素, 并查看删除后的结果}DeleteArrItem(arr, 3);for i := 0 to Length(arr) - 1 doMemo1.Lines.Add(Format(‘%d, %d‘, [arr[i].X, arr[i].Y]));end;--------------------------------------------------------------------------------有时使用动态数组的指针更方便, 简单修改即可:--------------------------------------------------------------------------------typeTArr = array of TPoint;PArr = ^TArr;{过程}procedure DeleteArrItem(p: PArr; Index: Integer);varCount: Cardinal;beginCount := Length(p^);if (Count = 0) or (Index < 0) or (Index >= Count) then Exit;Move(p^[Index+1], p^[Index], (Count-Index)* SizeOf(p^[0]));SetLength(p^, Count - 1);end;{测试}procedure TForm1.Button1Click(Sender: TObject);vararr: TArr;i: Integer;beginSetLength(arr, 5);arr[0].X := 1; arr[0].Y := 111;arr[1].X := 2; arr[1].Y := 222;arr[2].X := 3; arr[2].Y := 333;arr[3].X := 4; arr[3].Y := 444;arr[4].X := 5; arr[4].Y := 555;DeleteArrItem(@arr, 3);for i := 0 to Length(arr) - 1 doMemo1.Lines.Add(Format(‘%d, %d‘, [arr[i].X, arr[i].Y]));end; 

[转]delphi 删除动态数组的指定元素