Delphi中的进制转换

二进制转换

function binToDec(Value: string): integer;
var
  str: string;
  i: integer;
begin
  Str := UpperCase(Value);
  result := ;
  for i :=  to Length(str) do
    result := result *  + ORD(str[i]) - ;
end;

function mod_num(n1, n2: integer): integer; //取余数
begin
  result := n1 - n1 div n2 * n2
end;

function reverse(s: string): string; //取反串
var
  i, num: Integer;
  st: string;
begin
  num := Length(s);
  st := '';
  for i := num downto  do
  begin
    st := st + s[i];
  end;
  Result := st;
end;

function DecTobin(Value: Integer): string; //十进制转化二进制
var
  ST: string;
  N: Integer;
begin
  ST := '';
  n := value;
  while n >=  do
  begin
    st := st + IntToStr(mod_num(n, ));
    n := n div ;
  end;
  st := st + IntToStr(n);
  Result := reverse(st);
end;

16进制转字符

function   HexToChar(Str:   string):   string;
  var
      i:   integer;
      buf1:   array[..]   of   byte;
  begin
      for   i   :=      to   (length(Str)   div      -   )   do
      begin
          buf1[i]   :=   strtoint('$'   +   copy(Str,   i   *      +   ,   ));
          Result   :=   Result   +   char(buf1[i]);
      end;
  end;   

  function   CharToHex(Str:   string):   string;
  var
      i:   integer;
      ch:   char;
  begin
      for   i   :=      to   (length(str))   do
      begin
          ch   :=   Str[i];
          Result   :=   Result   +   inttohex(byte(ch),   );
      end;
  end;

16进制转十进制

function hextoint(s: string): Integer;
begin          //$代表16进制
  Result:=StrToInt('$'+s);
end;

数据转换成二进制

function conertde(s:string):string;
var //数据都是以二进制的形式保存
 i:integer;
begin
 for i:= to length(s) do
   result:=result+inttohex(ord(s[i]),);
end;