C# - 赋值运算符

C# 支持以下赋值运算符：

运算符	描述	示例
=	简单赋值运算符，将右侧操作数的值赋给左侧操作数	C = A + B 将 A + B 的值赋给 C
+=	加法赋值运算符，它将右侧操作数加到左侧操作数上，并将结果赋给左侧操作数	C += A 等价于 C = C + A
-=	减法赋值运算符，它将右侧操作数从左侧操作数中减去，并将结果赋给左侧操作数	C -= A 等价于 C = C - A
*=	乘法赋值运算符，它将右侧操作数乘以左侧操作数，并将结果赋给左侧操作数	C = A 等价于 C = C A
/=	除法赋值运算符，它将左侧操作数除以右侧操作数，并将结果赋给左侧操作数	C /= A 等价于 C = C / A
%=	取模赋值运算符，它使用两个操作数进行取模运算，并将结果赋给左侧操作数	C %= A 等价于 C = C % A
<<=	左移赋值运算符	C <<= 2 等同于 C = C << 2
>>=	右移赋值运算符	C >>= 2 等同于 C = C >> 2
&=	按位与赋值运算符	C &= 2 等同于 C = C & 2
^=	按位异或赋值运算符	C ^= 2 等同于 C = C ^ 2
\|=	按位或赋值运算符	C \|= 2 等同于 C = C \| 2

示例

以下示例演示了 C# 中所有可用的赋值运算符：

在线演示

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();
      }
   }
}

编译并运行上述代码后，将产生以下结果：

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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