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  1. 03-29-2011, 12:12 AM #1
    Megan Dosnueve
    Megan Dosnueve is offline Member
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    Unhappy Help with AWT CALCULATOR

    My codes ADD SUBTRACT MULTIPLY and DIVIDE sometimes work and sometimes don't. I can't identify what's wrong with my code. Can somebody help me please?

    Java Code: 
    import java.io.*;
import java.lang.Math.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Component.*;

public class SuperCalcu extends Frame implements ActionListener, WindowListener

/* IGUAL
 * PUNTO 
 * DECIMAL 
 * C 
 * MATH */

{
	//0 Label
	
	//1 ventana
	TextField  Txventana;
	
	//29 botones
	Button b1, b2, b3, b4, b5, b6, b7, b8, b9, b0; //10
	Button b10algo, blog, bealgo, bln; //4
	Button bpi, braiz, bpotencia, be; //4
	Button bsin, bcos, btan, btrig; //4
	Button bclear, bpunto, bigual; //3
	Button bsuma, bresta, bmulti, bdivi; //4
	
	//5 paneles
	Panel panelNorte, panelSur, panelEste, panelOeste, panelCentro;
	
	int v;

	String aux1;
	String aux2, lastCommand;
	String valor, calcDisplay;
	int op, contador=0;
	
	boolean punto=false;
	
	double n1, n2, n3, n4, preRes, secVal;
	double respuesta=0,res;
	
	public static void main(String[] args) throws IOException
	{
		SuperCalcu form=new SuperCalcu(); //crea un objeto de la clase
		form.setSize(400,600); //establece medidas de ventana en pixeles
		form.setTitle ("CASIO FX-Superb007"); //Titulo
		form.setVisible(true); //hace visible la ventana
		
	}
	
	public SuperCalcu() throws IOException {
		
		//Layout Principal
		setLayout(new BorderLayout(1,1));//principal
		
		//Paneles
		panelNorte= new Panel(new FlowLayout());
		panelSur= new Panel(new GridLayout(1,1));
	
		panelEste= new Panel(new GridLayout(4,1));
		panelOeste= new Panel(new GridLayout(5,1));
		panelCentro= new Panel(new GridLayout(6,3));
		
		//NORTE, terminado
		Txventana= new TextField(50);
		Txventana.setEditable(false);
		panelNorte.add(Txventana);
		
		//SUR, terminado
		
		bigual= new Button("=");//igual	
		panelSur.add(bigual);	
				//listener
		bigual.addActionListener(this);
		
		//OESTE, terminado
	
		b10algo= new Button("10^x");//10^algo
		blog= new Button("+/-");//Log
		bealgo= new Button("e^x");//E^algo
		bln= new Button("Ln");//Ln
		be= new Button("e");//e	
		
		panelOeste.add(b10algo);
		panelOeste.add(blog);
		panelOeste.add(bealgo);
		panelOeste.add(bln);
		panelOeste.add(be);
			
				//listener	
		b10algo.addActionListener(this);
		blog.addActionListener(this);
		bealgo.addActionListener(this);
		bln.addActionListener(this);
		be.addActionListener(this);
			
		//ESTE, terminado
		
		bsuma= new Button ("+");//suma
		bresta= new Button("-");//resta
		bmulti= new Button("*");//multi
		bdivi= new Button("/");//divi		
		
		panelEste.add(bsuma);
		panelEste.add(bresta);
		panelEste.add(bmulti);
		panelEste.add(bdivi);
		
				//listener
		bsuma.addActionListener(this);
		bresta.addActionListener(this);
		bmulti.addActionListener(this);
		bdivi.addActionListener(this);
		
		//CENTRO, terminado

		b1= new Button("1");//1
		b2= new Button("2");//2
		b3= new Button("3");//3
		b4= new Button("4");//4
		b5= new Button("5");//5
		b6= new Button("6");//6	
		b7= new Button("7");//7
		b8= new Button("8");//8
		b9= new Button("9");//9
		b0= new Button("0");//0
		

		
		bpi= new Button("Pi");//pi
		bpotencia= new Button("Potencia");//potencia
		braiz= new Button("Raiz");//raiz


		bsin= new Button("Sin");//sin
		bcos= new Button("Cos");//cos
		btan= new Button("Tan");//tan

		
		bpunto= new Button(".");//punto
		bclear= new Button("C");//clear	
		
		panelCentro.add(bpi);
		panelCentro.add(bpotencia);
		panelCentro.add(braiz);
		panelCentro.add(bsin);
		panelCentro.add(bcos);
		panelCentro.add(btan);
		panelCentro.add(b1);
		panelCentro.add(b2);
		panelCentro.add(b3);
		panelCentro.add(b4);
		panelCentro.add(b5);
		panelCentro.add(b6);
		panelCentro.add(b7);
		panelCentro.add(b8);
		panelCentro.add(b9);
		panelCentro.add(bpunto);				
		panelCentro.add(b0);
		panelCentro.add(bclear);
		
				//listener
		bpi.addActionListener(this);
		bpotencia.addActionListener(this);
		braiz.addActionListener(this);
		bsin.addActionListener(this);
		bcos.addActionListener(this);
		btan.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);
		bpunto.addActionListener(this);
		b0.addActionListener(this);
		bclear.addActionListener(this);
				
		panelCentro.repaint();
		
		
		//Agregar Paneles al Border Layout
		
		add(panelNorte, BorderLayout.NORTH);
		add(panelSur, BorderLayout.SOUTH);
		add(panelEste, BorderLayout.EAST);
		add(panelOeste, BorderLayout.WEST);
		add(panelCentro, BorderLayout.CENTER);

	
		//anade a la ventana un listener
		addWindowListener(this);	}
		
		//TODO BIEN HASTA AQUI
		
		public void repaint(Graphics g){
			
			//intento color
			g.setColor(Color.red);
		}
		
		public void actionPerformed(ActionEvent e){
			
			//input numbers
			
			if(e.getSource() == b1){ aux1="1"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b2){ aux1="2"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b3){ aux1="3"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b4){ aux1="4"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b5){ aux1="5"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b6){ aux1="6"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b7){ aux1="7"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b8){ aux1="8"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b9){ aux1="9"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == b0){ aux1="0"; valor=Txventana.getText()+aux1; Txventana.setText(valor);		}
			if(e.getSource() == bpunto&& punto==false){ aux1="."; valor=Txventana.getText()+aux1; Txventana.setText(valor); punto=true;	}
		
			//trabajando con funciones
			if(e.getSource() == bpi){		Txventana.setText(""+Math.PI); valor="";	}
			if(e.getSource() == be){		Txventana.setText(""+Math.E);  valor="";	}
				
			if(e.getSource() == bpotencia){	
					aux2=Txventana.getText();
				if(!aux2.equals("")){
					preRes=Double.parseDouble(Txventana.getText());
		            lastCommand="potencia";
		            Txventana.setText("");}}
		
			if(e.getSource() == braiz){
				
				aux2=Txventana.getText();
					if(!aux2.equals(""))
						{n1=Double.parseDouble(Txventana.getText());
						Txventana.setText(""+Math.sqrt(n1));
						}	}
			
			if(e.getSource() == bsin){	
				
				aux2=Txventana.getText();
					if(!aux2.equals(""))
					{n1=Double.parseDouble(Txventana.getText());
					Txventana.setText(""+Math.sin(Math.toRadians(n1)));
					}}
				
			if(e.getSource() == bcos){
				
				aux2=Txventana.getText();
					if(!aux2.equals(""))
					{n1=Double.parseDouble(Txventana.getText());
					Txventana.setText(""+Math.cos(Math.toRadians(n1)));
					}	}
					
			if(e.getSource() == btan){

				aux2=Txventana.getText();
					if(!aux2.equals(""))
						{n1=Double.parseDouble(Txventana.getText());
						Txventana.setText(""+Math.tan(Math.toRadians(n1)));
						}	}
			
			if(e.getSource() == b10algo){
				
				aux2=Txventana.getText();
					if(!aux2.equals(""))
						{n1=Double.parseDouble(Txventana.getText());
						Txventana.setText(""+Math.pow(10.0,n1));
						}	}
						
			if(e.getSource() == blog){ 				
				
				aux2=Txventana.getText();
					if(!aux2.equals(""))
						{n1=Double.parseDouble(Txventana.getText());
						n1=n1*(-1);
						Txventana.setText(""+n1);
						}	}
						
			if(e.getSource() == bealgo){
				
					aux2=Txventana.getText();
					if(!aux2.equals(""))
						{n1=Double.parseDouble(Txventana.getText());
						Txventana.setText(""+Math.pow(Math.E,n1));
						}	}
			
			if(e.getSource() == bln){
				
				aux2=Txventana.getText();
					if(!aux2.equals(""))
						{n1=Double.parseDouble(Txventana.getText());
						Txventana.setText(""+Math.log(n1));
						}	}
			
			if(e.getSource() == bsuma){	
					aux2=Txventana.getText();
				if(!aux2.equals("")){
					preRes=Double.parseDouble(Txventana.getText());
		            lastCommand="+";
		            Txventana.setText("");}	
		
			if(e.getSource() == bresta){ 
					aux2=Txventana.getText();
				if(!aux2.equals("")){
					preRes=Double.parseDouble(Txventana.getText());
		            lastCommand="-";
		            Txventana.setText("");}
				}
				
			if(e.getSource() == bmulti){ 
					aux2=Txventana.getText();
				if(!aux2.equals("")){
					preRes=Double.parseDouble(Txventana.getText());
		            lastCommand="*";
		            Txventana.setText("");}}
				
			if(e.getSource() == bdivi){	
					aux2=Txventana.getText();
				if(!aux2.equals("")){
					preRes=Double.parseDouble(Txventana.getText());
		            lastCommand="/";
		            Txventana.setText("");}}
			
			if(e.getSource() == bclear){ Txventana.setText("");	}
			
			if(e.getSource() == bigual){
          Double secVal=Double.parseDouble(Txventana.getText());
           
           if(lastCommand.equals("+"))
        	   res=preRes+secVal;
           else if(lastCommand.equals("-"))
                res=preRes-secVal;
           else if(lastCommand.equals("*"))
                res=preRes*secVal;   
           else if (lastCommand.equals("/"))
   				res=preRes/secVal; 
   			else if (lastCommand.equals("potencia"));
   				res=Math.pow(preRes,secVal);
    					              	             
           	   Txventana.setText(" "+res);
        	   lastCommand="=";
					
					}}
		public double calcOperaciones(int op, double aux2){
			if(op==1)
			{}
			if(op==2)
			{}
			if(op==3)
			{}
			if(op==4)
			{}
			if(op==5)
			{}
			return res;	}				
		
		public void windowClosing(WindowEvent e){
			
			System.exit(0);
		}
		public void windowActivated(WindowEvent e){
		}
		public void windowClosed(WindowEvent e){
		}
		public void windowDeactivated(WindowEvent e){
		}
		public void windowDeiconified(WindowEvent e){
		}
		public void windowIconified(WindowEvent e){
		}				
		public void windowOpened(WindowEvent e){
		}		
}
    Last edited by Fubarable; 03-29-2011 at 03:55 AM. Reason: code tags added
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  2. 03-29-2011, 12:13 AM #2
    Megan Dosnueve
    Megan Dosnueve is offline Member
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    Default

    Java Code: 
    if(e.getSource() == bsuma){	
aux2=Txventana.getText();
if(!aux2.equals("")){
preRes=Double.parseDouble(Txventana.getText());
lastCommand="+";
Txventana.setText("");}	

if(e.getSource() == bresta){ 
aux2=Txventana.getText();
if(!aux2.equals("")){
preRes=Double.parseDouble(Txventana.getText());
lastCommand="-";
Txventana.setText("");}
}

if(e.getSource() == bmulti){ 
aux2=Txventana.getText();
if(!aux2.equals("")){
preRes=Double.parseDouble(Txventana.getText());
lastCommand="*";
Txventana.setText("");}}

if(e.getSource() == bdivi){	
aux2=Txventana.getText();
if(!aux2.equals("")){
preRes=Double.parseDouble(Txventana.getText());
lastCommand="/";
Txventana.setText("");}}
    These ones. Cant add more than 2, sometimes stay in 0, howcome?
    Last edited by Fubarable; 03-29-2011 at 03:56 AM. Reason: code tags added
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  3. 04-04-2011, 05:49 PM #3
    gandrew
    gandrew is offline Member
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    Default

    Dear Madame: If you haven't solved this already, the problem lies in some brackets. For the addition operation:

    if(e.getSource() == bsuma){
    //System.out.println("Sum");
    aux2=Txventana.getText();
    if(!aux2.equals("")){
    preRes=Double.parseDouble(Txventana.getText());
    lastCommand="+";
    Txventana.setText("");}
    } // added this bracket

    The program flow is also falling into the exponent operation in the = button section. Remove the semi-colon so that the following line is part of the above condition.

    // program flow was falling into the exponent
    else if (lastCommand.equals("potencia")) //; problem was this semi-colon
    res=Math.pow(preRes,secVal); // which meant this line was always executed

    The best thing to do is comment out unnecessary functions and verify that addition works. Gradually uncomment more functions until you discover an error.

    Good luck.
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