 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;
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;
return hexNum;
}

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.