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function HexStringToDouble(const AHexString :string):double;
begin
if Length(AHexString)<>16 then Result := 0
else PInt64(@Result)^ := StrToInt64Def('$' + AHexString , 0);
end;
我记得我回答过这个问题.procedure TForm1.Button2Click(Sender: TObject);
const hexChars='0123456789ABCDEF';
datastr='32 46 35 42 31 39 30 30 2D 31 43 46 45 2D 30 38 30 31 2D 41';
var s,tmp1,tmp2:string;
x:integer;
function Getbyte(hexstr:string):integer;
begin
Result:=-1;
if length(hexstr)<>2 then exit;
Result:=(pos(hexstr[1],hexChars)-1) shl 4 + pos(hexstr[2],hexChars)-1;
end;
begin
s:=datastr;
tmp1:='';
while length(s)>0 do begin
x:=Getbyte(s[1]+s[2]);
tmp2:=tmp2+inttostr(x)+',';
tmp1:=tmp1+char(x);
delete(s,1,3);
end;
showmessage(datastr+#13+tmp2+' ___ '+tmp1);
end;
function HexToDouble(cs:string):Double;
const hexstr: array [0..15] of string =
('0000','0001','0010','0011',
'0100','0101','0110','0111',
'1000','1001','1010','1011',
'1100','1101','1110','1111');
var s,s2,intstr:string;
a,b,i,len:integer;
x:double;
function BintoInt(binstr:String):Int64;
var i:integer;
begin
Result:=0;
len:=Length(binstr);
for i:=1 to len do Result:=Result+(1 shl (len-i))*StrToInt(binstr[i]);
end;
begin
s:='';
for i:=Length(cs) downto 1 do s:=hexstr[StrToInt('$'+cs[i])]+s;
intstr:=copy(s,2,11);
s2:=StringOfChar('0',16-length(intstr))+intstr;
a:=BintoInt(s2)-1023;
delete(s,1,12);
s:='1'+s;
b:=BintoInt(copy(s,1,a+1));
s:=copy(s,a+2,length(s));
x:=0;
len:=Length(s);
for i:=1 to len do if s[i]='1' then x:=x+1/(int64(1) shl i);
Result:=b+x;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
showmessage(floattostr(HexToDouble('405C7107AD9735B3')));
end;