import java.io.*;
import java.text.*;

/*
	Die Klasse TextInput beinhaltet Methoden, mit denen man Standardtypen
	(char,float,double) von der Tastatur einlesen kann.
*/
  
public class TextInput extends Object {
    InputStreamReader inputstreamreader;
    BufferedReader bufferedreader;
    DecimalFormat df;
    Number n;

    public TextInput() {
    }

    public char readChar() {
        inputstreamreader = new InputStreamReader(System.in);
        bufferedreader = new BufferedReader(inputstreamreader);
        
        char ch ='\0';
        try {
            ch = (bufferedreader.readLine()).charAt(0);
        }
        catch(IOException e) { }
        return ch;
    }
    
    public String readString() {
        inputstreamreader = new InputStreamReader(System.in);
        bufferedreader = new BufferedReader(inputstreamreader);
        
        String str = null;
        
        try {
            str = bufferedreader.readLine();
        }
        catch (IOException e) { }
        return str;
    }


    public float readFloat() {
        inputstreamreader = new InputStreamReader(System.in);
        bufferedreader = new BufferedReader(inputstreamreader);
        DecimalFormat df = new DecimalFormat();
        Number n;
        float value;
        try {
            try {
                n = df.parse(bufferedreader.readLine() );
                value = n.floatValue();
            }
            catch (ParseException parseexception) {
                System.out.println("Fehler in der Eingabe!");
                value = 0;
            }
        }
        catch (IOException ioexception) {
            System.out.println("Fehler in der Eingabe!");
            value = 0;
        }
        return value;
    }

    public double readDouble() {
        inputstreamreader = new InputStreamReader(System.in);
        bufferedreader = new BufferedReader(inputstreamreader);
        DecimalFormat df = new DecimalFormat();
        Number n;
        double value=0;
        try {
            try {
                n = df.parse(bufferedreader.readLine() );
                value = n.doubleValue();
            }
            catch (ParseException parseexception) {
                System.out.println("Fehler in der Eingabe!");
                value = 0;
            }
        } catch (IOException e) { }
        
        return value;
    }
} // TextInput