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如何计算数组的范围,以便我可以将它发送到多个线程进行处理。这只适用于较低的范围。它不匹配数组的高值。如何计算Array的范围?
program Project1;
{$APPTYPE CONSOLE}
{$R *.res}
uses
System.SysUtils;
type
TRange = record
High: Integer;
Low: Integer;
end;
TRanges = Array of TRange;
procedure Split(const Size: Integer; const Slices: Integer; var Ranges: TRanges);
var
SliceSize: Integer;
SliceStart: Integer;
I: Integer;
begin
SliceSize := (Size + Slices) div Slices;
SetLength(Ranges, Slices);
SliceStart := 0;
for I := 0 to Slices - 1 do
begin
Ranges[I].Low := SliceStart;
SliceStart := SliceStart + SliceSize;
if SliceStart > Size then
SliceStart := Size;
Ranges[I].High := SliceStart - 1;
end;
end;
var
A: TArray<Integer>;
Ranges: TRanges;
begin
SetLength(A, 71);
Split(High(A), 7, Ranges); // split array in to seven ranges
// 70 is missing from Ranges..
ReadLn;
end.
传递高(A)是正确的,因为声明'SliceSize:=(面积+切片)的div片;'其实'( “真实尺寸” +切片 - 1 )div Slices'并使用High(A)有效地给出“实际大小”-1。 – Kanitatlan