public ParteDecimal(TextoAParsear t)
{
valor = "";
try
{
while (true)
{
char c = t.GetChar();
switch (c)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
valor = valor + c;
t.CharProcessed();
break;
default:
return;
}
}
}
catch (EndOfString eos)
{
return;
}
}
public Operador(TextoAParsear t)
{
operando = ' ';
try
{
if (t.Vacio())
{
throw new NotValidObject();
}
char c = t.GetChar();
switch (c)
{
case '+':
case '-':
case '/':
case '*':
operando = c;
t.CharProcessed();
return;
}
throw new NotValidObject();
}
catch (EndOfString eos)
{
throw new NotValidObject();
}
}
public Operacion(TextoAParsear t)
{
VarIzquierda = null;
OpIzquierda = null;
NumIzquierda = null;
operador = null;
operadorv = null;
derecha = null;
try
{
char c = t.GetChar();
if (c == '(')
{
t.CharProcessed();
OpIzquierda = new Operacion(t);
c = t.GetChar();
if (c == ')')
{
t.CharProcessed();
}
}
else
{
try
{
VarIzquierda = new Variable(t);
} catch (NotValidObject)
{
NumIzquierda = new Numero(t);
}
}
if (VarIzquierda == null)
{
operador = new Operador(t);
}
else
{
operadorv = new OperadorVariable(t);
}
derecha = new Operacion(t);
}
catch (EndOfString eos)
{
return;
}
catch (NotValidObject nvo)
{
return;
}
}
private void run_Click(object sender, EventArgs e)
{
string ope = operacion.Text;
if (ope == "clean")
{
log.Text = "";
operacion.Text = "";
VarValue.lista.Clear();
listaVariables.Text = "";
return;
}
log.Text += ope + " = ";
string result;
try
{
TextoAParsear tmp = new TextoAParsear(ope);
Operacion op = new Operacion(tmp);
if (!tmp.Vacio())
{
throw new Exception("Error de sintaxis");
}
result = op.Evalua().ToString();
log.Text += result + "\r\n";
log.SelectionStart = log.Text.Length;
log.SelectionLength = 0;
log.ScrollToCaret();
log.SelectAll();
operacion.Text = "(" + result + ")";
operacion.SelectionStart = operacion.Text.Length;
operacion.SelectionLength = 0;
listaVariables.Clear();
foreach (VarValue val in VarValue.lista)
{
listaVariables.Text += val.nombre.ToString() + ": " + val.value.ToString() + "\r\n";
}
}
catch (Exception ex)
{
log.Text += "\r\n" + ex.Message + "\r\n\r\n";
}
operacion.Focus();
}
public Numero(TextoAParsear t)
{
parteentera = new ParteDecimal();
partedecimal = new ParteDecimal();
try
{
parteentera = new ParteDecimal(t);
char c = t.GetChar();
if ((c == ',') || (c == '.'))
{
t.CharProcessed();
partedecimal = new ParteDecimal(t);
}
}
catch (EndOfString eos)
{
return;
}
}
public OperadorVariable(TextoAParsear t)
{
if (t.Vacio())
{
throw new NotValidObject();
}
char c = t.GetChar();
if (c == '=')
{
isAssignment = true;
op = null;
t.CharProcessed();
}
else
{
op = new Operador(t);
}
}
public Variable(TextoAParsear t)
{
char c = t.GetChar();
switch (c)
{
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
case 'k':
case 'l':
case 'm':
case 'n':
case 'o':
case 'p':
case 'q':
case 'r':
case 's':
case 't':
case 'v':
case 'w':
case 'x':
case 'y':
case 'z':
t.CharProcessed();
ValueObject = VarValue.FindVar(c);
return;
}
throw new NotValidObject();
}
