The document describes how to install and use several decompiler programs, including VB Decompiler Lite, Java Decompiler, and provides code snippets from decompiling sample programs for a calculator, matrix, variable for derivative, and matrix evaluator. It provides instructions on downloading, installing, and using the decompilers to view the source code of various compiled programs.

1. 1. DATOS INFORMATIVOS
1.1 Nombre: Gabriel Solano
1.2 Carrera: Sistemas
1.3 Nivel: 5to
1.4 Tema: Compiladores
1.5 Fecha: 21/04/2017
2. DESCRIPCION
DECOMPILADORES
Instalación Vb Decompiler lite
1) Descargar de la página Oficial el programa https://www.vb-
decompiler.org/download.htm Descomprimir y ejecutar el instalador

2. 2) Next
3) Aceptar los términos y condiciones

3. 4) Dar un directorio o dejarlo por defecto
5) Dar click en Next hasta elegir el Idioma, el cual pondremos Español

4. 6) Click en Install
7) Dejar activada la casilla de Launch VB Decompiler si necesitas utilizarlo.

5. 8) Interfaz
PROGRAMAS A DECOMPILAR
CALCULADORA

6. CODIGO FUENTE CALCULADORA
VERSION 5.00
Begin VB.Form Form1 Caption = "Calculadora by marco" ScaleMode = 1 AutoRedraw = False
FontTransparent = True BorderStyle = 4 'Fixed ToolWindow 'Icon = n/a LinkTopic = "Form1"
MaxButton = 0 'False MinButton = 0 'False ClientLeft = 45 ClientTop = 285 ClientWidth = 3975
ClientHeight = 3195 ShowInTaskbar = 0 'False StartUpPosition = 3 'Windows Default Begin
CommandButton salir Caption = "Salir" Left = 2160 Top = 2520 Width = 1695 Height = 495
TabIndex = 11 End Begin CommandButton new Caption = "Nuevo calculo" Left = 120 Top =
2520 Width = 1695 Height = 495 TabIndex = 10 End Begin CommandButton dividir Caption =
"/" Left = 3240 Top = 1800 Width = 615 Height = 495 TabIndex = 9 BeginProperty Font Name =
"MS Sans Serif" Size = 13.5 Charset = 0 Weight = 400 Underline = 0 'False Italic = 0 'False
Strikethrough = 0 'False EndProperty End Begin CommandButton por Caption = "x" Left = 2160
Top = 1800 Width = 615 Height = 495 TabIndex = 8 BeginProperty Font Name = "MS Sans Serif"
Size = 13.5 Charset = 0 Weight = 400 Underline = 0 'False Italic = 0 'False Strikethrough = 0
'False EndProperty End Begin CommandButton restar Caption = "-" Left = 1200 Top = 1800
Width = 615 Height = 495 TabIndex = 7 BeginProperty Font Name = "MS Sans Serif" Size = 13.5
Charset = 0 Weight = 700 Underline = 0 'False Italic = 0 'False Strikethrough = 0 'False
EndProperty End Begin CommandButton sumar Caption = "+" Left = 120 Top = 1800 Width =
615 Height = 495 TabIndex = 6 BeginProperty Font Name = "MS Sans Serif" Size = 13.5 Charset
= 0 Weight = 700 Underline = 0 'False Italic = 0 'False Strikethrough = 0 'False EndProperty End
Begin TextBox res Left = 1680 Top = 1080 Width = 1215 Height = 405 TabIndex = 5
BeginProperty Font Name = "MS Sans Serif" Size = 9.75 Charset = 0 Weight = 700 Underline = 0
'False Italic = 0 'False Strikethrough = 0 'False EndProperty End Begin TextBox can2 Left = 1680
Top = 600 Width = 1215 Height = 405 TabIndex = 4 BeginProperty Font Name = "MS Sans Serif"
Size = 9.75 Charset = 0 Weight = 400 Underline = 0 'False Italic = 0 'False Strikethrough = 0

7. 'False EndProperty End Begin TextBox can1 Left = 1680 Top = 120 Width = 1215 Height = 405
TabIndex = 3 BeginProperty Font Name = "MS Sans Serif" Size = 9.75 Charset = 0 Weight = 400
Underline = 0 'False Italic = 0 'False Strikethrough = 0 'False EndProperty End Begin Label
Label3 Caption = "Resultado" Left = 240 Top = 1200 Width = 1095 Height = 255 TabIndex = 2
BeginProperty Font Name = "MS Sans Serif" Size = 9.75 Charset = 0 Weight = 700 Underline = 0
'False Italic = 0 'False Strikethrough = 0 'False EndProperty End Begin Label Label2 Caption =
"Cantidad2" Left = 240 Top = 720 Width = 1095 Height = 615 TabIndex = 1 BeginProperty Font
Name = "MS Sans Serif" Size = 9.75 Charset = 0 Weight = 700 Underline = 0 'False Italic = 0
'False Strikethrough = 0 'False EndProperty End Begin Label Label1 Caption = "Cantidad1" Left
= 240 Top = 240 Width = 1215 Height = 495 TabIndex = 0 BeginProperty Font Name = "MS Sans
Serif" Size = 9.75 Charset = 0 Weight = 700 Underline = 0 'False Italic = 0 'False Strikethrough =
0 'False EndProperty End End Attribute VB_Name = "Form1"
MATRIZ NXM
CODIGO FUENTE MATRIZ

8. Begin VB.Form Form2
Caption = "Determinante 3*3 y 2*2"
ScaleMode = 1
AutoRedraw = False
FontTransparent = True
Picture = "Form2.frx":0
BorderStyle = 1 'Fixed Single
Icon = "Form2.frx":B179
LinkTopic = "Form2"
MaxButton = 0 'False
MinButton = 0 'False
ClientLeft = 5415
ClientTop = 3330
ClientWidth = 8805
ClientHeight = 4575
StartUpPosition = 2 'CenterScreen
Begin TextBox e5
Left = 5400
Top = 3840
Width = 735
Height = 375
Enabled = 0 'False
TabIndex = 17
End
Begin TextBox e1
Left = 3720
Top = 3360
Width = 495
Height = 375
TabIndex = 16
End

9. Begin TextBox e2
Left = 4320
Top = 3360
Width = 495
Height = 375
TabIndex = 15
End
Instalación Java Decompiler
1) Descargar programa con crack y ejecutar el instalador
2) Escoger el Idioma del paquete de instalación y click en Next.

10. 3) Aceptar términos y Condiciones

11. 4) Dar next hasta la ruta, cambiarlo en caso de ser necesario, caso contrario dejar
en default
5) Descarmcar la casilla de intalacion de Firefox Downloader y next
6) Click en Install

12. 7) Interfaz del programa

13. PROGRAMAS A DESCOMPILAR
VARIABLES PARA UNA DERIVADA
CODIGO FUENTE VARIABLE
package org.nfunk.jep;
import java.util.Observable;
public class Variable
extends Observable
{
protected String name;
private Object value;
private boolean isConstant = false;
private boolean validValue = false;
protected Variable(String paramString)
{
this.name = paramString;
this.value = null;
this.validValue = false;
}
protected Variable(String paramString, Object paramObject)
{
this.name = paramString;
this.value = paramObject;
this.validValue = (paramObject != null);
}
public String getName()
{
return this.name;
}
public boolean isConstant()
{
return this.isConstant;

14. }
public void setIsConstant(boolean paramBoolean)
{
this.isConstant = paramBoolean;
}
public Object getValue()
{
return this.value;
}
public boolean hasValidValue()
{
return this.validValue;
}
public void setValidValue(boolean paramBoolean)
{
if (isConstant()) {
return;
}
this.validValue = paramBoolean;
}
public boolean setValue(Object paramObject)
{
if (!setValueRaw(paramObject)) {
return false;
}
setChanged();
notifyObservers(paramObject);
return true;
}
protected boolean setValueRaw(Object paramObject)
{
if (this.isConstant) {
return false;
}
this.validValue = true;
this.value = paramObject;
return true;
}
public String toString()
{
if ((!this.validValue) || (this.value == null)) {
return this.name + ": null";
}
if (this.isConstant) {
return this.name + ": " + this.value.toString() + " (Constant)";
}
return this.name + ": " + this.value.toString();
}
}

15. MATRIZ
CODIGO FUENTE MATRIZ
public class MatrixEvaluator
implements ParserVisitor, EvaluatorI
{
private Stack stack = new Stack();
private MatrixJep mjep;
public MatrixValueI evaluate(MatrixNodeI paramMatrixNodeI, MatrixJep paramMatrixJep)
throws ParseException
{
this.mjep = paramMatrixJep;
return (MatrixValueI)paramMatrixNodeI.jjtAccept(this, null);
}
public Object eval(Node paramNode)
throws ParseException
{
MatrixValueI localMatrixValueI = (MatrixValueI)paramNode.jjtAccept(this, null);
return localMatrixValueI.copy();
}
public Object visit(SimpleNode paramSimpleNode, Object paramObject)
{
return null;
}
public Object visit(ASTStart paramASTStart, Object paramObject)
{
return null;
}
public Object visit(ASTConstant paramASTConstant, Object paramObject)
{
return ((ASTMConstant)paramASTConstant).getMValue();
}
public Object visit(ASTVarNode paramASTVarNode, Object paramObject)
throws ParseException
{
MatrixVariableI localMatrixVariableI = (MatrixVariableI)paramASTVarNode.getVar();
if (localMatrixVariableI.hasValidValue()) {
return localMatrixVariableI.getMValue();
}
if (!localMatrixVariableI.hasEquation()) {

16. throw new ParseException("Tried to evaluate a variable with an invalid value but no equation");
}
MatrixValueI localMatrixValueI = (MatrixValueI)localMatrixVariableI.getEquation().jjtAccept(this,
paramObject);
localMatrixVariableI.setMValue(localMatrixValueI);
return localMatrixValueI;
}
public Object visit(ASTFunNode paramASTFunNode, Object paramObject)
throws ParseException
{
MatrixNodeI localMatrixNodeI = (MatrixNodeI)paramASTFunNode;
PostfixMathCommandI localPostfixMathCommandI = paramASTFunNode.getPFMC();
Object localObject1;
if ((localPostfixMathCommandI instanceof MatrixSpecialEvaluationI))
{
localObject1 = (MatrixSpecialEvaluationI)localPostfixMathCommandI;
return ((MatrixSpecialEvaluationI)localObject1).evaluate(localMatrixNodeI, this, this.mjep);
}
if ((localPostfixMathCommandI instanceof CallbackEvaluationI))
{
localObject1 = ((CallbackEvaluationI)localPostfixMathCommandI).evaluate(paramASTFunNode, this);
if ((localObject1 instanceof MatrixValueI)) {
localMatrixNodeI.getMValue().setEles((MatrixValueI)localObject1);
} else {
localMatrixNodeI.getMValue().setEle(0, localObject1);
}
return localMatrixNodeI.getMValue();
}
if ((localPostfixMathCommandI instanceof SpecialEvaluationI)) {
throw new ParseException("Encountered an instance of SpecialEvaluationI");
}
Object localObject2;
if ((localPostfixMathCommandI instanceof BinaryOperatorI))
{
localObject1 = (BinaryOperatorI)localPostfixMathCommandI;
localObject2 = (MatrixValueI)paramASTFunNode.jjtGetChild(0).jjtAccept(this, paramObject);
MatrixValueI localMatrixValueI1 = (MatrixValueI)paramASTFunNode.jjtGetChild(1).jjtAccept(this,
paramObject);
return ((BinaryOperatorI)localObject1).calcValue(localMatrixNodeI.getMValue(),
(MatrixValueI)localObject2, localMatrixValueI1);
}
if ((localPostfixMathCommandI instanceof UnaryOperatorI))
{
localObject1 = (UnaryOperatorI)localPostfixMathCommandI;
localObject2 = (MatrixValueI)paramASTFunNode.jjtGetChild(0).jjtAccept(this, paramObject);
return ((UnaryOperatorI)localObject1).calcValue(localMatrixNodeI.getMValue(),
(MatrixValueI)localObject2);
}
if ((localPostfixMathCommandI instanceof NaryOperatorI))
{
localObject1 = (NaryOperatorI)localPostfixMathCommandI;
localObject2 = new MatrixValueI[paramASTFunNode.jjtGetNumChildren()];
for (int k = 0; k < localObject2.length; k++) {
localObject2[k] = ((MatrixValueI)paramASTFunNode.jjtGetChild(k).jjtAccept(this, paramObject));
}
return ((NaryOperatorI)localObject1).calcValue(localMatrixNodeI.getMValue(),
(MatrixValueI[])localObject2);
}
if ((localPostfixMathCommandI instanceof Comparative))
{
localObject1 = (MatrixValueI)paramASTFunNode.jjtGetChild(0).jjtAccept(this, paramObject);
localObject2 = (MatrixValueI)paramASTFunNode.jjtGetChild(1).jjtAccept(this, paramObject);
this.stack.push(localObject1);
this.stack.push(localObject2);
localPostfixMathCommandI.setCurNumberOfParameters(2);
localPostfixMathCommandI.run(this.stack);
localMatrixNodeI.getMValue().setEle(0, this.stack.pop());
return localMatrixNodeI.getMValue();
}
int i = paramASTFunNode.jjtGetNumChildren();
for (int j = 0; j < i; j++)
{
MatrixValueI localMatrixValueI2 = (MatrixValueI)paramASTFunNode.jjtGetChild(j).jjtAccept(this,
paramObject);
if (!localMatrixValueI2.getDim().equals(Dimensions.ONE)) {
throw new ParseException("Arguments of " + paramASTFunNode.getName() + " must be scalers");
}
this.stack.push(localMatrixValueI2.getEle(0));
}
localPostfixMathCommandI.setCurNumberOfParameters(i);
localPostfixMathCommandI.run(this.stack);
localMatrixNodeI.getMValue().setEle(0, this.stack.pop());
return localMatrixNodeI.getMValue();
}

17. }