C # tutorial Operator Overloading

Operator Overloading
C# oprator have some special meaning ,but you can change and redefine operator meaning.

Some Point to remember before define Operator Overloading

• The method should be a public and static method
• The method is marked by keyword "operator" followed by the operator symbol

Below is the example of of unary(+) operator overloading
 
Example 1

using System;

public class Program

{

                  public static void Main()

                  {

                         Area obj1 = new Area(10,10);

                         Area obj2= new Area(15, 12);

                         Area overlod_obj = obj1 + obj2;

                         Console.WriteLine("Value of mX :"+overlod_obj.GetValX().ToString());

                         Console.WriteLine("Value of mY :" + overlod_obj.GetValY().ToString());

                         Console.ReadKey();

                  }

}

class Area

{

            int mX;

            int mY;

            public Area(int x, int y)

            {

                mX = x;

                mY = y;

            }

            public static Area operator +(Area m1, Area m2)

            {

                return new Area(m1.mX * m2.mX, m2.mY * m2.mY);

            }

           public int GetValX()

          {

              return mX;

          }

          public int GetValY()

         {

            return mY;

         }

}

Output :

Value of mX :150
Value of mY :144

Below is the table , showing  Operator,Operator Type and Overloading Possible or not

Operator Type	Operator	Overloading Possible
unary	+, -, !, ~, ++, --	Yes
binary	+, -, *, /, %	Yes
comparison	==, !=, <, >, <=, >=	Yes
conditional	&&, ||	Yes
assignment	+=, -=, *=, /=, %=	No
Misc..	=, ., ?:, ->, new, is, sizeof, typeof	No

Below is the example of of unary(++) operator overloading

Example 2

using System;

public class Program

{

           public static void Main()

           {

     

                 Area obj1 = new Area(10);

                Console.WriteLine("Value of m :" + obj1.GetValueX().ToString());

                Area obj2 = obj1++;

                Console.WriteLine("Value of m :" + obj2.GetValueX().ToString());

               Console.ReadKey();

          }

}

class Area

{

         int m;

        public Area(int x)

         {

             m = x;

        }

         public static Area operator ++(Area obj)

        {

             obj.m++;

             return obj;

        }

        public int GetValueX()

        {

              return m;

        }

}

Output :

Value of m :10
Value of m :11