//----------------------------------------------------------
// Written By   :  Chuck Kelly
// Date         :  1-22-2002
// Description  :  Hex to IEEE 32-bit floating point converter
//----------------------------------------------------------

#include <iostream.h>
#include <stdlib.h>
#include <iomanip.h>

int main()
{
  char ch;
  union u_var {
    long HexNumber;
    float IEEENumber;
  } shared;

  cout << "Hex to IEEE converter, v0.3\n\n";
  do{
    cout << "Enter 8 digit Hex number ________\b\b\b\b\b\b\b\b";
    cin >> hex >> shared.HexNumber;

    // display sign bit
    cout << "Sign bit = ";
    if (shared.HexNumber & 0x80000000)
      cout << 1;
    else
      cout << 0;
    cout << endl;

    cout.setf(ios::uppercase);      // turn on uppercase
    // display exponent
    int exp = ((shared.HexNumber & 0x7F800000) >> 23);
    cout << "Exponent = " << hex << exp << endl;

    // display mantissa
    int mant = (shared.HexNumber & 0x007FFFFF);
    mant = mant | 0x00800000;      // set bit that is always removed
    cout << "Mantissa = " << hex << mant << endl;

    cout.unsetf(ios::uppercase);    // turn off uppercase
    cout << "The IEEE 32-bit value is " << shared.IEEENumber << endl;
    cout << "\nContinue (y/n)? ";
    cin >> ch;
  }while (ch != 'n' && ch != 'N');

  return 0;
}