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C # - Operator atas pemuatan

C # - Operator atas pemuatan


Anda dapat mendefinisikan atau membebani sebagian besar operator built -in yang tersedia di C # . Sehingga programmer dapat menggunakan operator dengan jenis yang ditetapkan pengguna juga. operator overload adalah fungsi dengan nama khusus operator kata kunci diikuti oleh simbol untuk operator yang didefinisikan . mirip dengan fungsi lainnya , operator overload memiliki tipe kembali dan daftar parameter .

Misalnya , melalui fungsi berikut :

public static Box operator+ (Box b, Box c)
{
   Box box = new Box();
   box.length = b.length + c.length;
   box.breadth = b.breadth + c.breadth;
   box.height = b.height + c.height;
   return box;
}

Fungsi di atas mengimplementasikan operator Selain ( + ) untuk kelas Box ditetapkan pengguna . Ia menambahkan atribut dua benda Box dan mengembalikan dihasilkan Box objek .

Menerapkan operator atas pemuatan

Program berikut menunjukkan implementasi lengkap :

using System;
namespace OperatorOvlApplication
{
   class Box
   {
      private double length;   // Length of a box
      private double breadth;  // Breadth of a box
      private double height;   // Height of a box

      public double getVolume()
      {
         return length * breadth * height;
      }
      
      public void setLength( double len )
      {
         length = len;
      }

      public void setBreadth( double bre )
      {
         breadth = bre;
      }

      public void setHeight( double hei )
      {
         height = hei;
      }
      
      // Overload + operator to add two Box objects.
      public static Box operator+ (Box b, Box c)
      {
         Box box = new Box();
         box.length = b.length + c.length;
         box.breadth = b.breadth + c.breadth;
         box.height = b.height + c.height;
         return box;
      }

   }

   class Tester
   {
      static void Main(string[] args)
      {
         Box Box1 = new Box();   // Declare Box1 of type Box
         Box Box2 = new Box();   // Declare Box2 of type Box
         Box Box3 = new Box();   // Declare Box3 of type Box
         double volume = 0.0;    // Store the volume of a box here

         // box 1 specification
         Box1.setLength(6.0);
         Box1.setBreadth(7.0);
         Box1.setHeight(5.0);

         // box 2 specification
         Box2.setLength(12.0);
         Box2.setBreadth(13.0);
         Box2.setHeight(10.0);

         // volume of box 1
         volume = Box1.getVolume();
         Console.WriteLine("Volume of Box1 : {0}", volume);

         // volume of box 2
         volume = Box2.getVolume();
         Console.WriteLine("Volume of Box2 : {0}", volume);

         // Add two object as follows:
         Box3 = Box1 + Box2;

         // volume of box 3
         volume = Box3.getVolume();
         Console.WriteLine("Volume of Box3 : {0}", volume);
         Console.ReadKey();
      }
   }
}


Ketika kode di atas dikompilasi dan dijalankan , menghasilkan hasil sebagai berikut :

Volume of Box1 : 210
Volume of Box2 : 1560
Volume of Box3 : 5400


lebih dari beban mampu dan beban non - lebih mampu Operator

operator Keterangan
+ , - , , ~ , ++ , - ! Ini operator unary mengambil satu operan dan dapat kelebihan beban .

+ , - , * , / , % Ini operator biner mengambil satu operan dan dapat kelebihan beban .

== , ! = , < , > , < = , > = Operator perbandingan dapat kelebihan beban

&& , || Operator logis kondisional tidak dapat kelebihan beban langsung .

+ = , - = , * = , / = , % = Operator penugasan tidak bisa kelebihan beban .

= , , : , - > , Baru , yang , sizeof , typeof operator ini tidak dapat kelebihan beban . ? .

contoh

Dalam terang diskusi di atas , mari kita memperpanjang contoh sebelumnya , dan membebani beberapa operator lainnya :

using System;
namespace OperatorOvlApplication
{
   class Box
   {
      private double length;    // Length of a box
      private double breadth;   // Breadth of a box
      private double height;    // Height of a box
      
      public double getVolume()
      {
         return length * breadth * height;
      }
      
      public void setLength( double len )
      {
         length = len;
      }
      
      public void setBreadth( double bre )
      {
         breadth = bre;
      }
      
      
      public void setHeight( double hei )
      {
         height = hei;
      }
      
      // Overload + operator to add two Box objects.
      public static Box operator+ (Box b, Box c)
      {
         Box box = new Box();
         box.length = b.length + c.length;
         box.breadth = b.breadth + c.breadth;
         box.height = b.height + c.height;
         return box;
      }
      
      public static bool operator == (Box lhs, Box rhs)
      {
         bool status = false;
         if (lhs.length == rhs.length && lhs.height == rhs.height && lhs.breadth == rhs.breadth)
         {
            status = true;
         }
         return status;
      }
      
      public static bool operator !=(Box lhs, Box rhs)
      {
         bool status = false;
         if (lhs.length != rhs.length || lhs.height != rhs.height || lhs.breadth != rhs.breadth)
         {
            status = true;
         }
         return status;
      }
      
      public static bool operator <(Box lhs, Box rhs)
      {
         bool status = false;
         if (lhs.length < rhs.length && lhs.height < rhs.height && lhs.breadth < rhs.breadth)
         {
            status = true;
         }
         return status;
      }
      
      public static bool operator >(Box lhs, Box rhs)
      {
         bool status = false;
         if (lhs.length > rhs.length && lhs.height > rhs.height && lhs.breadth > rhs.breadth)
         {
            status = true;
         }
         return status;
      }
      
      public static bool operator <=(Box lhs, Box rhs)
      {
         bool status = false;
         if (lhs.length <= rhs.length && lhs.height <= rhs.height && lhs.breadth <= rhs.breadth)
         {
            status = true;
         }
         return status;
      }
      
      public static bool operator >=(Box lhs, Box rhs)
      {
         bool status = false;
         if (lhs.length >= rhs.length && lhs.height >= rhs.height && lhs.breadth >= rhs.breadth)
         {
            status = true;
         }
         return status;
      }
      public override string ToString()
      {
         return String.Format("({0}, {1}, {2})", length, breadth, height);
      }
   }
   
   class Tester
   {
      static void Main(string[] args)
      {
         Box Box1 = new Box();   // Declare Box1 of type Box
         Box Box2 = new Box();   // Declare Box2 of type Box
         Box Box3 = new Box();   // Declare Box3 of type Box
         Box Box4 = new Box();
         double volume = 0.0;    // Store the volume of a box here
         
         // box 1 specification
         Box1.setLength(6.0);
         Box1.setBreadth(7.0);
         Box1.setHeight(5.0);
         
         // box 2 specification
         Box2.setLength(12.0);
         Box2.setBreadth(13.0);
         Box2.setHeight(10.0);
         
         //displaying the Boxes using the overloaded ToString():
         Console.WriteLine("Box 1: {0}", Box1.ToString());
         Console.WriteLine("Box 2: {0}", Box2.ToString());
         
         // volume of box 1
         volume = Box1.getVolume();
         Console.WriteLine("Volume of Box1 : {0}", volume);
         
         // volume of box 2
         volume = Box2.getVolume();
         Console.WriteLine("Volume of Box2 : {0}", volume);
         
         // Add two object as follows:
         Box3 = Box1 + Box2;
         Console.WriteLine("Box 3: {0}", Box3.ToString());
         
         // volume of box 3
         volume = Box3.getVolume();
         Console.WriteLine("Volume of Box3 : {0}", volume);
         
         //comparing the boxes
         if (Box1 > Box2)
            Console.WriteLine("Box1 is greater than Box2");
         else
            Console.WriteLine("Box1 is  greater than Box2");
         
         if (Box1 < Box2)
            Console.WriteLine("Box1 is less than Box2");
         else
            Console.WriteLine("Box1 is not less than Box2");
         
         if (Box1 >= Box2)
            Console.WriteLine("Box1 is greater or equal to Box2");
         else
            Console.WriteLine("Box1 is not greater or equal to Box2");
         
         if (Box1 <= Box2)
            Console.WriteLine("Box1 is less or equal to Box2");
         else
            Console.WriteLine("Box1 is not less or equal to Box2");
         
         if (Box1 != Box2)
            Console.WriteLine("Box1 is not equal to Box2");
         else
            Console.WriteLine("Box1 is not greater or equal to Box2");
         Box4 = Box3;
         
         if (Box3 == Box4)
            Console.WriteLine("Box3 is equal to Box4");
         else
            Console.WriteLine("Box3 is not equal to Box4");
         
         Console.ReadKey();
      }
   }
}

Ketika kode di atas dikompilasi dan dijalankan , menghasilkan hasil sebagai berikut :

Box 1: (6, 7, 5)
Box 2: (12, 13, 10)
Volume of Box1 : 210
Volume of Box2 : 1560
Box 3: (18, 20, 15)
Volume of Box3 : 5400
Box1 is not greater than Box2
Box1 is less than Box2
Box1 is not greater or equal to Box2
Box1 is less or equal to Box2
Box1 is not equal to Box2
Box3 is equal to Box4

ok sekian dulu pembahasan dari saya semoga bermanfaat ,terimakasih

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