//This app shows how to create/use a custom method that returns an answer






  //'*************************************USING CUSTOM CLASS*********************************
 
          private void btnAdd_Click(object sender, EventArgs e)
        {
             //---create an instance of the NumberMachine Class I created
            NumberMachine myMathMaker = new NumberMachine();

            short firstNumber = Convert.ToInt16(txtFirst.Text);
            short secondNumber = Convert.ToInt16(txtSecond.Text);

            myAnswer = myMathMaker.DoAddition(firstNumber, secondNumber);
            lblClassAnswer.Text =Convert.ToString(myAnswer);
        }

        private void btnSubtract_Click(object sender, EventArgs e)
        {
            //---create an instance of the NumberMachine Class I created
            NumberMachine myMathMaker = new NumberMachine();

            short firstNumber = Convert.ToInt16(txtFirst.Text);
            short secondNumber = Convert.ToInt16(txtSecond.Text);

            myAnswer = myMathMaker.DoSubtraction(firstNumber, secondNumber);
            lblClassAnswer.Text = Convert.ToString(myAnswer);
        }

   //**********************************END OF USING CUSTOM CLASS*********************************



namespace UsingClasses_Part1
{
    public class NumberMachine
    {
    
   /// <summary>
        /// This function accepts two short integers and returns the sum as a short
   /// </summary>
   /// <param name="x"></param>
   /// <param name="y"></param>
   /// <returns>Returns a short integer</returns>
 
        public short DoAddition( short x, short y)
   
        {
            short myAnswer = 0;
            myAnswer = Convert.ToInt16(x + y);
            return myAnswer; 
        }


/// <summary>
        /// This function accepts two short integers subtracts them & returns the result as a short
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns></returns>
       public short DoSubtraction(int x, int y)
        {
            short myAnswer = 0;
            myAnswer = Convert.ToInt16(x - y);
            return myAnswer;

        }