using System;

namespace ConsoleApplication

{

    class Program

    {

        double[] X =new double [30];

 int i, n;

 private void dataGridView1_MouseClick(object sender, MouseEventArgs e)

 {

 n = int.Parse(textBox1.Text);

 dataGridView1.RowCount = n;

 dataGridView1.ColumnCount = 1;

 }

 private void button1_Click(object sender, EventArgs e)

 {

 double s=0, sr,najblizi;

 n = int.Parse(textBox1.Text);

 for (i = 0; i < n; i++)

 X[i] = Convert.ToDouble(dataGridView1[0, i].Value);

 for (i = 0; i < n; i++)

 s += X[i];

 sr = s / n;

 najblizi = X[0];

 for (i = 1; i < n; i++)

 if (Math.Abs(X[i] - sr) < Math.Abs(najblizi - sr))

 najblizi = X[i];

 label2.Text = " SR = " + sr.ToString("0.00");

 label3.Text = "NAJBLIZI JE: " + najblizi;

 }

}

}