Go語言賦值運算子範例

Go語言支援以下賦值運算子：
賦值運算子範例

運算子	描述	範例
=	簡單賦值操作符，將值從右側運算元分配給左側運算元	C = A + B，就是將A + B的值賦給C
+=	相加和賦值運算子，向左運算元新增右運算元，並將結果賦給左運算元	C += A 相當於 C = C + A
-=	減去和賦值運算子，從左運算元中減去右運算元，並將結果賦給左運算元	C -= A 相當於 C = C - A
*=	乘法和賦值運算子，它將右運算元與左運算元相乘，並將結果賦給左運算元	C *= A 相當於 C = C * A
/=	除法和賦值運算子，它用右運算元劃分左運算元，並將結果分配給左運算元	C /= A 相當於 C = C / A
%=	模數和賦值運算子，它使用兩個運算元來取模，並將結果分配給左運算元	C %= A 相當於 C = C % A
<<=	左移和賦值運算子	C << = 2相當於C = C << 2
>>=	右移和賦值運算子	C >>= 2 相當於 C = C >> 2
&=	按位元和賦值運算子	C &= 2 相當於 C = C & 2
^=	按位元互斥或和賦值運算子	C ^= 2 相當於 C = C ^ 2
=	按位元包含OR和賦值運算子	C = 2 相當於 C = C 2

範例

嘗試以下範例來了解Go程式設計語言中提供的所有關係運算子：

package main

import "fmt"

func main() {
   var a int = 21
   var c int

   c =  a
   fmt.Printf("Line 1 - =  Operator Example, Value of c = %d\n", c )

   c +=  a
   fmt.Printf("Line 2 - += Operator Example, Value of c = %d\n", c )

   c -=  a
   fmt.Printf("Line 3 - -= Operator Example, Value of c = %d\n", c )

   c *=  a
   fmt.Printf("Line 4 - *= Operator Example, Value of c = %d\n", c )

   c /=  a
   fmt.Printf("Line 5 - /= Operator Example, Value of c = %d\n", c )

   c  = 200; 

   c <<=  2
   fmt.Printf("Line 6 - <<= Operator Example, Value of c = %d\n", c )

   c >>=  2
   fmt.Printf("Line 7 - >>= Operator Example, Value of c = %d\n", c )

   c &=  2
   fmt.Printf("Line 8 - &= Operator Example, Value of c = %d\n", c )

   c ^=  2
   fmt.Printf("Line 9 - ^= Operator Example, Value of c = %d\n", c )

   c |=  2
   fmt.Printf("Line 10 - |= Operator Example, Value of c = %d\n", c )

}

當編譯和執行上面程式，它產生以下結果：

Line 1 - =  Operator Example, Value of c = 21
Line 2 - += Operator Example, Value of c = 42
Line 3 - -= Operator Example, Value of c = 21
Line 4 - *= Operator Example, Value of c = 441
Line 5 - /= Operator Example, Value of c = 21
Line 6 - <<= Operator Example, Value of c = 800
Line 7 - >>= Operator Example, Value of c = 200
Line 8 - &= Operator Example, Value of c = 0
Line 9 - ^= Operator Example, Value of c = 2
Line 10 - |= Operator Example, Value of c = 2