C# Method Overloading Example 3rd Edition

함수 오버로딩을 통하여 간단한 사칙 계산기 구현.
생성자 함수를 이용하여 값을 초기화 하고 소멸자를 사용할 것

[ Source ]

// 왠만한 시스템 코드 및 form 코드는 생략하였습니다.
  public class Calc
  {
   private int numA,numB,reSum,reSub,reMux;
   private double reDiv;

   public Calc()
   {
    numA = 0;
    numB = 0;
    reSum = 0;
    reSub = 0;
    reMux = 0;
    reDiv = 0;
   }
   ~Calc()
   {
    MessageBox.Show("여러분과 저만이 진정 롹 뭬니아~","Thank you!!!");
   }

   public int funcSum(int num1, int num2)
   {
    numA = num1;
    numB = num2;
    reSum = numA + numB;
    return reSum;
   }
   public int funcSub(int num1, int num2)
   {
    numA = num1;
    numB = num2;
    reSub = numA - numB;
    return reSub;
   }
   public int funcMux(int num1, int num2)
   {
    numA = num1;
    numB = num2;
    reMux = numA * numB;
    return reMux;
   }  
   public double funcDiv(int num1, int num2)
   {
    numA = num1;
    numB = num2;
    reDiv= numA / numB;
    return reDiv;
   }
  }

 
   /// <summary>
   /// Clean up any resources being used.
   /// </summary>
   protected override void Dispose( bool disposing )
   {
    if( disposing )
    {
     if (components != null)
     {
      components.Dispose();
     }
    }
    base.Dispose( disposing );
   }

   #region Windows Form Designer generated code
   /// <summary>
   /// Required method for Designer support - do not modify
   /// the contents of this method with the code editor.
   /// </summary>
 
   /// <summary>
   /// The main entry point for the application.
   /// </summary>
   [STAThread]
   static void Main()
   {
    Application.Run(new Form1());
   }

   private void button3_Click(object sender, System.EventArgs e)
   {
    this.Close();
   }

   private void button2_Click(object sender, System.EventArgs e)
   {
    textBox1.Text = null;
    textBox2.Text = null;
    textBox3.Text = null;
    textBox4.Text = null;
    textBox5.Text = null;
    textBox6.Text = null;
   }

   private void button1_Click(object sender, System.EventArgs e)
   {
    int num1, num2;
    Calc hnd_Cal = new Calc();
    num1 = Convert.ToInt32(textBox1.Text);
    num2 = Convert.ToInt32(textBox2.Text);
    textBox3.Text = num1 + " + " + num2 + " = " +hnd_Cal.funcSum(num1,num2).ToString();
    textBox4.Text = num1 + " - " + num2 + " = " +hnd_Cal.funcSub(num1,num2).ToString();
    textBox5.Text = num1 + " * " + num2 + " = " + hnd_Cal.funcMux(num1, num2).ToString();
    textBox6.Text = num1 + " / " + num2 + " = " + hnd_Cal.funcDiv(num1, num2).ToString();
   }
  }
 }