Practica 4visual

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Prcatica4a_Visual
{

public partial class FrmEjercicio4 : Form
{
rectangulo rect;
circulo circ;
Triangulo trian;
public FrmEjercicio4()
{

rect = new rectangulo();
circ = new circulo();
trian = new Triangulo();
InitializeComponent();
txtanchorect.Text = "0";
txtlargorect.Text = "0";
}

private void cmdcalculo_Click(object sender, EventArgs e)
{

int opc=0;
opc = System.Int32.Parse(txtopcion.Text);


if (opc == 1)
{
txtlargorect.Visible = true;
txtanchorect.Visible = true;
lbllargo.Visible = true;
lbl12.Visible = true;
lblbase.Visible = true;
lblradio.Visible = true;
lblaltura.Visible = true;
txtanchorect.Focus();
rect.Ancho= Double.Parse(txtanchorect.Text);
rect.Largo = Double.Parse(txtlargorect.Text);


lblareas.Text = "Area = " +rect.area().ToString();
lblperimetros.Text = "Perimetro= " + rect.perimetro().ToString();

}
else if (opc == 2)
{

txtanchorect.Visible = true;
txtlargorect.Visible = true;
txtlargorect.Focus();
lblbase.Visible = true;
lbllargo.Visible = true;
trian.altura = Double.Parse(txtanchorect.Text);
trian.basetrieangulo = Double.Parse(txtlargorect.Text);
lblareas.Text = "El area del triangulo es: " + trian.areatriangulo().ToString();
}
else if (opc == 3)
{

txtlargorect.Focus();
lblradio.Visible = true;
txtlargorect.Visible = true;
circ.Radio = Double.Parse(txtlargorect.Text);
lblareas.Text = "El area del Circulo es: " + circ.Area().ToString();
lblperimetros.Text = "La circuferencia es: " + circ.Circunferencia().ToString();
}
else
{
MessageBox.Show("Tu opcion no esta en el menu....elige bien");
txtopcion.Focus();
txtopcion.Clear();

}

}


}
}