hex nums to decimal nums?

I bought an lcd and a joystick shield for my arduino, with the hopes of making a primitive game system. My only problem, however, is that the joystick speaks in decimal nums, and the lcd uses hex. I wrote some code to convert the decimals to hex, but it only ever returns zero. Can anyone give me some help? Or better yet, a working decimal-to-hex function?

Here is my code: (Yes, I know that it only accepts two digits. I made it that way ON PURPOSE.)

int dec2hex(int decNum){
  int remainder;
  int ans = decNum;
  char hexNum[2];
  int counter = 0;
  while((ans > 0) && (counter >= 0)){
    remainder = ans % 16;
    ans = (ans - remainder) / 16;
    if(remainder == '0'){
   hexNum[1 - counter] = '0';
  }else if(remainder == '1'){
   hexNum[1 - counter] = '1'; 
  } else if(remainder == '2'){
   hexNum[1 - counter] = '2'; 
  } else if(remainder == '3'){
   hexNum[1 - counter] = '3'; 
  } else if(remainder == '4'){
   hexNum[1 - counter] = '4';
  } else if(remainder == '5'){
   hexNum[1 - counter] = '5'; 
  } else if(remainder == '6'){
   hexNum[1 - counter] = '6'; 
  } else if(remainder == '7'){
   hexNum[1 - counter] = '7'; 
  } else if(remainder == '8'){
   hexNum[1 - counter] = '8'; 
  } else if(remainder == '9'){
   hexNum[1 - counter] = '9'; 
  } else if(remainder == '10'){
   hexNum[1 - counter] = 'A';
  } else if(remainder == '11'){
   hexNum[1 - counter] = 'B'; 
  } else if(remainder == '12'){
   hexNum[1 - counter] = 'C'; 
  } else if(remainder == '13'){
   hexNum[1 - counter] = 'D'; 
  } else if(remainder == '14'){
   hexNum[1 - counter] = 'E';
  } else if(remainder == '15'){
   hexNum[1 - counter] = 'F';
  }
  counter++;
  }
  return hexNum[1];
  return hexNum[0];
}

You can’t return two items from a function like that - the first return will execute and, well, return!

To convert a byte to ASCII hex:

#define TO_HEX(x)  (((x) > 10) ? (x) - 10 + 'A' : (x) + '0')
MSD = TO_HEX (byteVal >> 4);
LSD =  TO_HEX (byteVal & 15);

I'm sure that makes perfect sense to you, but I'm an amateur and don't understand how to use that code (ex: where to put that code, what it returns, etc).

Never mind. I figured it out. Thanks.