Csharp-assignment-operators

提供:Dev Guides
移動先:案内検索

C#-割り当て演算子

C#でサポートされている次の代入演算子があります-

Operator Description Example
= Simple assignment operator, Assigns values from right side operands to left side operand C = A + B assigns value of A + B into C
+= Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand C += A is equivalent to C = C + A
-= Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand C -= A is equivalent to C = C - A
*= Multiply AND assignment operator, It multiplies right operand with the left operand and assign the result to left operand C *= A is equivalent to C = C *A
/= Divide AND assignment operator, It divides left operand with the right operand and assign the result to left operand C/= A is equivalent to C = C/A
%= Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operand C %= A is equivalent to C = C % A
<⇐ Left shift AND assignment operator C <⇐ 2 is same as C = C << 2
>>= Right shift AND assignment operator C >>= 2 is same as C = C >> 2
&= Bitwise AND assignment operator C &= 2 is same as C = C & 2
^= bitwise exclusive OR and assignment operator C ^= 2 is same as C = C ^ 2
= bitwise inclusive OR and assignment operator
C = 2 is same as C = C 2

次の例は、C#で使用可能なすべての代入演算子を示しています-

using System;

namespace OperatorsAppl {

   class Program {

      static void Main(string[] args) {
         int a = 21;
         int c;
         c = a;
         Console.WriteLine("Line 1 - =  Value of c = {0}", c);

         c += a;
         Console.WriteLine("Line 2 - += Value of c = {0}", c);

         c -= a;
         Console.WriteLine("Line 3 - -=  Value of c = {0}", c);

         c* = a;
         Console.WriteLine("Line 4 - *=  Value of c = {0}", c);

         c/= a;
         Console.WriteLine("Line 5 -/=  Value of c = {0}", c);

         c = 200;
         c %= a;
         Console.WriteLine("Line 6 - %=  Value of c = {0}", c);

         c <<= 2;
         Console.WriteLine("Line 7 - <<=  Value of c = {0}", c);

         c >>= 2;
         Console.WriteLine("Line 8 - >>=  Value of c = {0}", c);

         c &= 2;
         Console.WriteLine("Line 9 - &=  Value of c = {0}", c);

         c ^= 2;
         Console.WriteLine("Line 10 - ^=  Value of c = {0}", c);

         c |= 2;
         Console.WriteLine("Line 11 - |=  Value of c = {0}", c);
         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-

Line 1 - = Value of c = 21
Line 2 - += Value of c = 42
Line 3 - -= Value of c = 21
Line 4 - *= Value of c = 441
Line 5 -/= Value of c = 21
Line 6 - %= Value of c = 11
Line 7 - <<= Value of c = 44
Line 8 - >>= Value of c = 11
Line 9 - &= Value of c = 2
Line 10 - ^= Value of c = 0
Line 11 - |= Value of c = 2