Char to String

/*
 *  Create a function that will return a string.
 *  It accepts 'inputValue' that is up to 255, but you can make it an int or longint...
 *  ...after you make some edits in the function.
 *  inputValue:   5       7       6
 *  Digits:      1st     2nd     3rd
 */
unsigned char* returnString(unsigned char inputValue)
{
    static unsigned char processedString[4]; // Return a string of 3 digits.
    unsigned char firstDigitCounter = 0; // Brute-force counter for first digit.
    unsigned char secondDigitCounter = 0; // Brute-force counter for second digit.
    if (inputValue > 99) // If we have a 3 digit number,
    {
        while (inputValue > 99) // Until our number is 3 digits, i.e. bigger than 99,
        {
            inputValue -= 100; // Subtract 100 and..
            firstDigitCounter++; //.. increment first digit.
        }
        while (inputValue > 9) // Until our number is 3 digits, i.e. bigger than 99,
        {
            inputValue -= 10; // Subtract 10 and..
            secondDigitCounter++; //.. increment second digit.
        }

        // Now, we have left the 'inputValue' as a single digit.

        processedString[0] = firstDigitCounter + 0x30; // First digit
        processedString[1] = secondDigitCounter + 0x30; // Second digit
        processedString[2] = inputValue + 0x30; // Third digit
        processedString[3] = '\0'; // String terminator.
    }
    else // If we have a 2 digit number,
    {
        while (inputValue > 9) // Until our number is 3 digits, i.e. bigger than 99,
        {
            inputValue -= 10; // Subtract 10 and..
            secondDigitCounter++; //.. increment second digit.
        }
        processedString[0] = secondDigitCounter + 0x30; // Second digit
        processedString[1] = inputValue + 0x30; // Third digit
        processedString[2] = '\0'; // String terminator.
    }
    return processedString; // Return the processed string.
}