public void test_read_bad_data()
{
int[] arr_input = new int[] { 0, 1, 2, 3, 4, 5, 6, 7 };
Fenwick_Tree ft = new Fenwick_Tree(arr_input);
Assert.AreEqual(false, ft.read(3) == 9);
}
private void button1_Click(object sender, EventArgs e)
{
int a;
if (int.TryParse(textBox1.Text, out a))
{
if (a < 0 || a >= f.Count)
{
MessageBox.Show("out of range");
}
else
{
label3.Text = Convert.ToString(f.read(a));
}
}
else
{
MessageBox.Show("Error!");
}
}