(C++ Builder) Converting a double to a String of bits

include <assert>


String doubleToBitString(const double& anyDouble)
{
  static union MyUnion
  {
    unsigned int myInts[2];
    double myDouble;
  } myUnion;
  //assert(sizeof(myUnion.myInts) == sizeof(myUnion.myDouble));
  myUnion.myDouble = anyDouble;
  unsigned int myInt0 = myUnion.myInts[0];
  unsigned int myInt1 = myUnion.myInts[1];
  String myBitString;
  for (unsigned int i = 0; i<32; ++i)
  {
    if (myInt0%2==0)
      myBitString = "0" + myBitString;
    else
      myBitString = "1" + myBitString;
    myInt0>>=1;
  }
  for (unsigned int i = 0; i<32; ++i)
  {
    if (myInt1%2==0)
      myBitString = "0" + myBitString;
    else
      myBitString = "1" + myBitString;
    myInt1>>=1;
  }
  return myBitString;
}
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  const String bitStringOne = doubleToBitString(1.0);
  const String bitStringZero = doubleToBitString(0.0);
  const String bitStringMinusZero = doubleToBitString(-0.0);
  const String bitStringMinusOne = doubleToBitString(-1.0);
  for (int y=0; y<64; ++y)
  {
    StringGrid1->Cells[0][y+1]=y;
    StringGrid1->Cells[1][y+1]=bitStringMinusOne[y+1]; //AnsiString starts at index 1
    StringGrid1->Cells[2][y+1]=bitStringMinusZero[y+1];
    StringGrid1->Cells[3][y+1]=bitStringZero[y+1];
    StringGrid1->Cells[4][y+1]=bitStringOne[y+1];
  }

Topic links

• assert
• const
• double
• int
• static
• String
• StringGrid1
• TStringGrid
• union
• unsigned
• void