pomo6t

molq nqkoi da mi pomogne ako moje z tozi kalkulator.trqbva da mu se dobavqt 3 butona:
1 znak za +/-
2 deseti4na zapetaq (dase vavejda edin pat ,ne trqbva da stava: 1,23,45)
3 znak CE za iztrivane (toi si ima C za triene)
ako nqkoi moje molq da pomogne.predvaritelno blagodarq

//CalculateurNC
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class CalculateurNC extends Applet {
String arg="";
int rezVal=0;
Button number[] = new Button[10];
Button func[] = new Button[6];
Panel num_panel;
Panel func_panel;
Panel rez_panel;
TextField rez;
char oper;

public void init(){
oper = ' ';
setLayout(null);

num_panel = new Panel();
num_panel.setLayout(new GridLayout(4,3));
for(int i=9; i>=0; i--){
number = new Button((new String()).valueOf(i));
number.addActionListener(new BN());
num_panel.add(number);
}

func[0] = new Button("C");
func[0].addActionListener(new C());
num_panel.add(func[0]);

func[1] = new Button("=");
func[1].addActionListener(new OPER());
num_panel.add(func[1]);
num_panel.setBounds(20,100,180,180);
add( num_panel);

func_panel = new Panel();
func_panel.setLayout(new GridLayout(4,1));
func[2] = new Button("+");
func[2].addActionListener(new OPER());
func_panel.add(func[2]);

func[3] = new Button("-");
func[3].addActionListener(new OPER());
func_panel.add(func[3]);

func[4] = new Button("*");
func[4].addActionListener(new OPER());
func_panel.add(func[4]);

func[5] = new Button("^");
func[5].addActionListener(new OPER());
func_panel.add(func[5]);


func_panel.setBounds(210,100,65,180);
add(func_panel);


rez_panel = new Panel();
rez = new TextField("0",10);
rez_panel.add(rez);
rez_panel.setBounds(20,20,240,40);
add(rez_panel);

}

class BN implements ActionListener{
public void actionPerformed(ActionEvent e) {
arg += e.getActionCommand();
rez.setText(arg);
}
}

class OPER implements ActionListener{
public void actionPerformed(ActionEvent e) {
int i,help,argi;
if(arg.length()==0)argi=0;
else argi = (new Integer(arg)).intValue();
switch(oper){
case '+': rezVal += argi;break;
case '-': rezVal -= argi;break;
case '*': rezVal *= argi;break;
case '=': oper = ' ';break;
case '^': for(i=1,help=rezVal; i < argi;i++)
rezVal *=help;
break;
case ' ': rezVal= argi;
}
rez.setText(rezVal+"");
arg = "";
oper = e.getActionCommand().charAt(0);
}
}

class C implements ActionListener{
public void actionPerformed(ActionEvent e) {
arg = "";
rezVal =0;
oper = ' ';
rez.setText(rezVal+"");
}
}

// To close the application:
static class WL extends WindowAdapter {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
}

// A main() for the application:
public static void main(String[] args) {
CalculateurNC applet = new CalculateurNC();
Frame aFrame = new Frame("CalculateurNC");
aFrame.addWindowListener(new WL());
aFrame.add(applet, BorderLayout.CENTER);
aFrame.setSize(400,400);
applet.init();
applet.start();
aFrame.setVisible(true);
}
}

И аз писах такова нещо виж ми сорса : [линк]
Дано да ти помогне.