/**
 * A TextAnalyser object takes text (either directly as a String, or read in from a file), 
 * and it maintains a count of the occurrences of each letter in that text. 
 * 
 * So e.g. analysing the text "A tap tot" would mean adding 
 * 1 each to the counts for O and P, 
 * 2 to the count for A, and 
 * 3 to the count for T. 
 * 
 * Letters are regarded as case-insensitive (so e.g. count bs and Bs together). 
 * Non-letter characters are ignored. 
 * The counts for each text analysed are added together until a reset operation is invoked. 
 * The class provides various methods for interrogating the data. 
 * 
 * @author Lyndon While 
 * @version 1.1 
 */

public class TextAnalyser
{
    private int   letters;     // the total number of letters analysed since the last reset 
    private int[] frequencies; // the number of occurrences of each letter of the alphabet (case-insensitive) 

    // initialise the two instance variables 
    public TextAnalyser()
    {
        // TODO 1
    }
    
    // initialise the two instance variables, and analyse the String initial 
    public TextAnalyser(String initial)
    {
        // TODO 7
    }
    
    // analyse the String s 
    // add to each count in frequencies the number of occurrences of each letter in s, and update letters 
    // remember that non-letter characeters must be ignored
    public void analyse (String s)
    {
        // TODO 2
    }
    
    // analyse the contents of the file f 
    // read in the file as a FileIO object, then analyse the contents 
    public void analyseFile (String f)
    {
        // TODO 8
    }

    // clear the instance variables 
    public void reset() 
    {
        // TODO 6
    }
    
    // return the number of letters that have been seen since the last reset 
    public int lettersAnalysed()
    {
        // TODO 3
        return -1;
    }
    
    // return the number of occurrences of letter that have been seen since the last reset 
    public int frequency (char letter)
    {
        // TODO 4
        return -1;
    } 
    
    // return the most common letter seen since the last reset 
    // if no letters have been analysed, return '?' 
    public char mostFrequent ()
    {
        //TODO 5
        return '!';
    }
    
    // use Oblongs to draw a histogram of the frequencies 
    // create an Oblong for each bar of the histogram, and arrange them appropriately on the screen 
    public void histogram()
    {
	// TODO 9
    }

}