Ejercicio 3

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace ejercicio1

{

    public partial class ejercico4 : Form

    {

        public ejercico4()

        {

            InitializeComponent();

        }

        private void ejercico4_Load(object sender, EventArgs e)

        {

           

                cbosuel.Items.Add("gerente");

                cbosuel.Items.Add("admi");

                cbosuel.Items.Add("otros");

        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            int sueldo = 0;

            if (cbosuel.Text == "gerente")

            {

                sueldo = 4500;

            }

            else if (cbosuel.Text == "admi")

            {

                sueldo = 2300;

            }

            else if (cbosuel.Text == "otros")

            {

                sueldo = 1000;

            }

            textBox1.Text = sueldo.ToString();

        }

     

    }

}

Ejercicio 2

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace ejercicio1

{

    public partial class ejercicio3 : Form

    {

        public ejercicio3()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int p, c;

            double sub, igv, total;

            p = int.Parse(textBox1.Text);

            c = int.Parse(textBox2.Text);

            sub = p * c;

            igv = p * 0.18;

            total = sub - igv;

            textBox3.Text = sub.ToString();

            textBox4.Text = igv.ToString();

            textBox5.Text = total.ToString();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            textBox1.Text = "";

            textBox2.Text = "";

            textBox3.Text = "";

            textBox4.Text = "";

            textBox5.Text = "";

        }

        private void button3_Click(object sender, EventArgs e)

        {

            this.Close();

        }

    }

}

Ejercicio 1

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace ejercicio1

{

    public partial class ejercicio2 : Form

    {

        public ejercicio2()

        {

            InitializeComponent();

        }

        private void button4_Click(object sender, EventArgs e)

        {

            int sue;

            double boni, des, tot;

            sue = int.Parse(textBox1.Text);

            boni = sue * 0.005;

            des = sue * 0.002;

            tot = (sue + boni) - des;

            textBox2.Text = boni.ToString();

            textBox3.Text = des.ToString();

            textBox4.Text = tot.ToString();

        }

    }

}