private void button1_Click(object sender, EventArgs e)
{
try
{
account at = new account();
int M = int.Parse(txtNo1.Text.Trim());
int N = int.Parse(txtNo2.Text.Trim());
string str = comboBox1.Text;
switch (str)
{
case "加": txtResult.Text = at.addition(M, N).ToString(); break;
case "减": txtResult.Text = at.subtration(M, N).ToString(); break;
case "乘": txtResult.Text = at.multiplication(M, N).ToString(); break;
case "除": txtResult.Text = at.division(M, N).ToString(); break;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}