import java.awt.*;
import java.awt.event.*;
public class Calc1 extends Frame implements ActionListener {
  TextField txtVal;
  Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bp,bm,bpw,bAdd,bSub,bMul,bDiv,bCls,bEqu;
  Button bsin,bcos,btan,bsqr,bx,bc;
  int a=1,b=1,Op=0,n=1;
  double O=0.0,ans=0.0,x;
  Calc1() {
    setCursor(new Cursor(Cursor.HAND_CURSOR));
    setFont(new Font("Dialog",0,18));
    setTitle("Calculater By MVC");
    txtVal=new TextField(18);
    txtVal.setFont(new Font("Dialog",0,18));
    b1=new Button("1");
    b2=new Button("2");
    b3=new Button("3");
    b4=new Button("4");
    b5=new Button("5");
    b6=new Button("6");
    b7=new Button("7");
    b8=new Button("8");
    b9=new Button("9");
    b0=new Button("0");
    bp=new Button(".");
    bm=new Button("+/-");
    bpw=new Button("^");
    bMul=new Button("*");
    bAdd=new Button("+");
    bSub=new Button("-");
    bDiv=new Button("/");
    bCls=new Button("C");
    bEqu=new Button("=");
    bsin=new Button("sin");
    bcos=new Button("cos");
    btan=new Button("tan");
    bsqr=new Button("sqr");
    bx=new Button("1/x");
    bc=new Button("c");
    bEqu.setBackground(new Color(0,0,111));
    add(txtVal);
    txtVal.setBackground(new Color(204,204,204));
    txtVal.setEditable(false);
    txtVal.setText("0");
    add(bc);
    add(bsin);
    add(b7);
    add(b8);
    add(b9);
    add(bAdd);
    add(bcos);
    add(b4);
    add(b5);
    add(b6);
    add(bSub);
    add(btan);
    add(b1);
    add(b2);
    add(b3);
    add(bMul);
    add(bsqr);
    add(b0);
    add(bp);
    add(bm);
    add(bDiv);
    add(bx);
    add(bpw);
    add(bCls);
    add(bEqu);
    bAdd.addActionListener(this);
    bc.addActionListener(this);
    bSub.addActionListener(this);
    bMul.addActionListener(this);
    bDiv.addActionListener(this);
    bCls.addActionListener(this);
    bEqu.addActionListener(this);
    b1.addActionListener(this);
    b2.addActionListener(this);
    b3.addActionListener(this);
    b4.addActionListener(this);
    b5.addActionListener(this);
    b6.addActionListener(this);
    b7.addActionListener(this);
    b8.addActionListener(this);
    b9.addActionListener(this);
    b0.addActionListener(this);
    bp.addActionListener(this);
    bm.addActionListener(this);
    bpw.addActionListener(this);
    bsin.addActionListener(this);
    bcos.addActionListener(this);
    btan.addActionListener(this);
    bsqr.addActionListener(this);
    bx.addActionListener(this);
    this.addWindowListener(
      new WindowAdapter() {
       public void  windowClosing(WindowEvent W) { System.exit(0); }
      });
  }
  public void actionPerformed(ActionEvent A) {
    if (A.getSource()==b0) { 
      if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
        txtVal.setText("0");
      else if (a==1)
             txtVal.setText(txtVal.getText()+"0");
           else { 
             txtVal.setText("0");
             a=1; 
           }
    } else if (A.getSource()==b1) { 
            if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
              txtVal.setText("1");
            else if (a==1)
                   txtVal.setText(txtVal.getText()+"1");  
                 else { 
                   txtVal.setText("1");
                   a=1; 
                 }
    } else if (A.getSource()==b2) { 
            if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
               txtVal.setText("2");
            else if (a==1)
                   txtVal.setText(txtVal.getText()+"2");
                 else { 
                   txtVal.setText("2");
                   a=1;
                 }
    } else if (A.getSource()==b3) { 
            if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
              txtVal.setText("3");
            else if (a==1)
                   txtVal.setText(txtVal.getText()+"3");
                 else { 
                   txtVal.setText("3");
                   a=1; 
                 }
    } else if (A.getSource()==b4)
        { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
          txtVal.setText("4");
         else if (a==1)
          txtVal.setText(txtVal.getText()+"4");
         else
          {txtVal.setText("4");
            a=1; }
          }
         else if (A.getSource()==b5)
          { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
          txtVal.setText("5");
         else if (a==1)
          txtVal.setText(txtVal.getText()+"5");
         else
          {txtVal.setText("5");
            a=1; }
          }
        else if (A.getSource()==b6)
          { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
            txtVal.setText("6");
            else if (a==1)
            txtVal.setText(txtVal.getText()+"6");
            else
            { txtVal.setText("6");
              a=1; }
          }
         else if (A.getSource()==b7)
          { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
            txtVal.setText("7");
          else if (a==1)
          txtVal.setText(txtVal.getText()+"7");
          else
         { txtVal.setText("7");
          a=1; }
        }
        else if (A.getSource()==b8)
        { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
          txtVal.setText("8");
        else if (a==1)
          txtVal.setText(txtVal.getText()+"8");
        else
          { txtVal.setText("8");
            a=1; }
          }
        else if (A.getSource()==b9)
        { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
          txtVal.setText("9");
        else if (a==1)
          txtVal.setText(txtVal.getText()+"9");
        else
          { txtVal.setText("9");
            a=1; }
          }
        else if (A.getSource()==bp)
        { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
          txtVal.setText(".");
        else if (a==1)
          txtVal.setText(txtVal.getText()+".");
        else
          { txtVal.setText(".");
            a=1; }
          }
        else if (A.getSource()==bm)
          { if (txtVal.getText().length()==1&&txtVal.getText().equals("0"))
            txtVal.setText("0");
          if ((txtVal.getText()).charAt(0)=='-')
          { StringBuffer S=new StringBuffer(txtVal.getText());
            S.setCharAt(0, ' ' );
            txtVal.setText(String.valueOf(S)); }
          if ((txtVal.getText()).charAt(0)!='-')
            { txtVal.setText("-"+txtVal.getText()); }
          else
            { txtVal.setText("0"); }
          }
          else if (A.getSource()==bAdd)
            {
              if (a==1&&n==1)
              { O=Double.parseDouble(txtVal.getText());
                a=2;Op=1;n=2;
              } else if (a==1&&n==2)
              {
              ans=add(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              O=Double.parseDouble(txtVal.getText());
                a=2;Op=1;
              } else if (a==2&&n==1)
              {
              O=Double.parseDouble(txtVal.getText());
                a=2;Op=1;
              }
            }
          else if (A.getSource()==bSub)
            {
              if (a==1&&n==1)
              { O=Double.parseDouble(txtVal.getText());
                a=2;Op=2;n=2;
              }
              else if (a==1&&n==2)
              {
              ans=sub(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              O=Double.parseDouble(txtVal.getText());
                a=2;Op=2;
              }
              else if (a==2&&n==1)
              {
              O=Double.parseDouble(txtVal.getText());
              a=2;Op=2;
              }
            }
          else if (A.getSource()==bMul)
            {
              if (a==1&&n==1)
              { O=Double.parseDouble(txtVal.getText());
                a=2;Op=3;n=2;
              }
              else if (a==1&&n==2)
              {ans=mul(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              O=Double.parseDouble(txtVal.getText());
                a=2;Op=3;
              }
              else if (a==2&&n==1)
              {
              O=Double.parseDouble(txtVal.getText());
              a=2;Op=2;
              }
            }
          else if (A.getSource()==bDiv)
            {
              if (a==1&&n==1)
              { O=Double.parseDouble(txtVal.getText());
                a=2;Op=4;n=2;
              }else if (a==1&&n==2)
              {
              ans=div(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              O=Double.parseDouble(txtVal.getText());
                a=2;Op=4;
              }
              else if (a==2&&n==1)
              {
              O=Double.parseDouble(txtVal.getText());
              a=2;Op=4;
              }
            }
          else if (A.getSource()==bpw)
              { O=Double.parseDouble(txtVal.getText());
                Op=5;
                a=2;
              }

          else if (A.getSource()==bsin)
              { O=Double.parseDouble(txtVal.getText());
                txtVal.setText(Double.toString(Math.sin(Math.PI/(180/O))));
                a=2;
               }

          else if (A.getSource()==bcos)
              { O=Double.parseDouble(txtVal.getText());
                txtVal.setText(Double.toString(Math.sin(Math.PI/(180/O))));
                a=2;
               }

          else if (A.getSource()==bsin)
              { O=Double.parseDouble(txtVal.getText());
                txtVal.setText(Double.toString(Math.sin(Math.PI/(180/O))));
                a=2;
               }

          else if (A.getSource()==bsqr)
              { O=Double.parseDouble(txtVal.getText());
                txtVal.setText(Double.toString(Math.sqrt(0)));
                a=2;
               }
          else if (A.getSource()==bx)
              { O=Double.parseDouble(txtVal.getText());
              txtVal.setText(Double.toString(1/O));
              a=2;
              }
          else if (A.getSource()==bEqu)
            { if (Op==1)
            {
              ans=add(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              Op=0;
              a=2;n=1;
            }
               if (Op==2)
            {
              ans=sub(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              Op=0;
              a=2;n=1;
            }
               if (Op==3)
            {
              ans=mul(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              Op=0;
              a=2;n=1;
            }
               if (Op==4)
            {
              ans=div(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              Op=0;
              a=2;n=1;
            }
               if (Op==5)
            {
              ans=pow(O,Double.parseDouble(txtVal.getText()));
              txtVal.setText(Double.toString(ans));
              Op=0;
              a=2;n=1;
            }
          }
          if (A.getSource()==bCls)
          { txtVal.setText("0");a=1;O=0;}
          }
double add(double A,double B) {  return A+B;  }
double sub(double A,double B) {  return A-B;  }
double mul(double A,double B) {  return A*B;  }
double div(double A,double B) {  return A/B;  }
double pow(double A,double B) { 
  x=A;
  for (int i=1;i<b ;i++ ) { x=x*A; }
  return x; 
}
public static void main(String arg[]) {
  Calc1 A=new Calc1();
  A.setSize(250,280);
  A.setLayout(new FlowLayout());
  A.setVisible(true);
  A.setBackground(new Color(200,132,123));
}
}