Csharp-misc-operators

C＃-その他の演算子

*sizeof* や*？など、他の重要な演算子はほとんどありません。 ：* C＃でサポートされています。

Operator	Description	Example
sizeof()	Returns the size of a data type.	sizeof(int), returns 4.
typeof()	Returns the type of a class.	typeof(StreamReader);
&	Returns the address of an variable.	&a; returns actual address of the variable.
*	Pointer to a variable.	*a; creates pointer named 'a' to a variable.
? :	Conditional Expression	If Condition is true ? Then value X : Otherwise value Y
is	Determines whether an object is of a certain type.	If( Ford is Car)//checks if Ford is an object of the Car class.
as	Cast without raising an exception if the cast fails.	Object obj = new StringReader("Hello"); StringReader r = obj as StringReader;

例

using System;

namespace OperatorsAppl {

   class Program {

      static void Main(string[] args) {
        /*example of sizeof operator*/
         Console.WriteLine("The size of int is {0}", sizeof(int));
         Console.WriteLine("The size of short is {0}", sizeof(short));
         Console.WriteLine("The size of double is {0}", sizeof(double));

        /*example of ternary operator*/
         int a, b;
         a = 10;
         b = (a == 1) ? 20 : 30;
         Console.WriteLine("Value of b is {0}", b);

         b = (a == 10) ? 20 : 30;
         Console.WriteLine("Value of b is {0}", b);
         Console.ReadLine();
      }
   }
}

上記のコードをコンパイルして実行すると、次の結果が生成されます-

The size of int is 4
The size of short is 2
The size of double is 8
Value of b is 30
Value of b is 20