Beispiel #1
0
 private void BtnTan_Click(object sender, EventArgs e)
 {
     //if there's input call the Third library and perform the tan function
     if (CheckForInput(tbResult.Text))
     {
         //if tan returns true output returned value
         if (Trigonometry.DegreesTan(double.Parse(tbResult.Text), out double tan))
         {
             tbResult.Text = tan.ToString();
             isTotal       = true;
         }
         //if tan returns false print error to user
         else
         {
             MessageBox.Show("Invalid input");
         }
     }
     //if there's no input or input is invalid print error to user
     else
     {
         MessageBox.Show("Please enter valid input");
     }
 }