C# - 賦值運算子

C# 支援以下賦值運算子：

運算子	描述	示例
=	簡單賦值運算子，將右側運算元的值賦給左側運算元	C = A + B 將 A + B 的值賦給 C
+=	加法賦值運算子，它將右側運算元加到左側運算元上，並將結果賦給左側運算元	C += A 等價於 C = C + A
-=	減法賦值運算子，它將右側運算元從左側運算元中減去，並將結果賦給左側運算元	C -= A 等價於 C = C - A
*=	乘法賦值運算子，它將右側運算元乘以左側運算元，並將結果賦給左側運算元	C = A 等價於 C = C A
/=	除法賦值運算子，它將左側運算元除以右側運算元，並將結果賦給左側運算元	C /= A 等價於 C = C / A
%=	取模賦值運算子，它使用兩個運算元進行取模運算，並將結果賦給左側運算元	C %= A 等價於 C = C % A
<<=	左移賦值運算子	C <<= 2 等同於 C = C << 2
>>=	右移賦值運算子	C >>= 2 等同於 C = C >> 2
&=	按位與賦值運算子	C &= 2 等同於 C = C & 2
^=	按位異或賦值運算子	C ^= 2 等同於 C = C ^ 2
\|=	按位或賦值運算子	C \|= 2 等同於 C = C \| 2

示例

以下示例演示了 C# 中所有可用的賦值運算子：

線上演示

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();
      }
   }
}

編譯並執行上述程式碼後，將產生以下結果：

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

csharp_operators.htm

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