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//十進(jìn)制 to 二進(jìn)制 function IntToBin(Value: LongInt;Size: Integer): String; var i: Integer; begin Result:=''; for i:=Size-1 downto 0 do begin if Value and (1 shl i)<>0 then begin Result:=Result+'1'; end else begin Result:=Result+'0'; end; end; end; //二進(jìn)制 to 十進(jìn)制 function BintoInt(Value: String): LongInt; var i,Size: Integer; begin Result:=0; Size:=Length(Value); for i:=Size downto 1 do begin if Copy(Value,i,1)='1' then Result:=Result+(1 shl (Size-i)); end; end; function floatBintoInt(Value: String): real; var i,Size: Integer; begin Result:=0; Size:=Length(Value); for i:=Size downto 1 do begin if Copy(Value,i,1)='1' then Result:=Result+1/(1 shl i); end; end; //十六進(jìn)制 to 二進(jìn)制 function HextoBinary(Hex:string):string; const BOX: array [0..15] of string = ('0000','0001','0010','0011', '0100','0101','0110','0111', '1000','1001','1010','1011', '1100','1101','1110','1111'); var i:integer; begin for i:=Length(Hex) downto 1 do Result:=BOX[StrToInt('$'+Hex[i])]+Result; end; //十六進(jìn)制 to 十進(jìn)制 浮點(diǎn)型 function HextoFloat(s:string):real; var b,temp:string; e:integer; f:real; begin b:=HextoBinary(s); temp := copy(b,2,8); e:=BintoInt(temp)-127; temp := copy(b,10,23); f := 1+floatBintoInt(temp); if(copy(b,1,1)='0')then result := power(2,e)*f else result :=-power(2,e)*f; end; |
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