BCD <> Decimal

//---------------------------------------------------------------------------

#include <vcl.h>
#include <iostream>
#pragma hdrstop

using namespace std;

uint8_t dec2bcd(uint8_t);
uint8_t bcd2dec(uint8_t);

//---------------------------------------------------------------------------

#pragma argsused
int main(int argc, char* argv[])
{
  cout << "Dec : BCD" << "\n";
  for (uint8_t i = 10; i < 100; i++) {
    cout << (int)i << "   :  " << (int)dec2bcd(i) << "\n";
  }

  cout << "-> " << (int)bcd2dec(0x81) << "\n";

  return 0;
}

//---------------------------------------------------------------------------

// Convert Decimal to BCD
uint8_t dec2bcd(uint8_t num)
{
  return ((num / 10 * 16) + (num & 10));
}

// Convert BCD to Decimal
uint8_t bcd2dec(uint8_t num)
{
  return ((num / 16 * 10) + (num % 16));
}