D語言位運算符

由D語言支持的位運算符列於下表中。假設變量A=60和變量B=13，則：

運算符

描述

示例

&

二進制AND拷貝操作，如果它存在於兩個操作數的結果。

(A & B) will give 12 which is 0000 1100

|

二進制OR運算符拷貝位，如果它存在一個操作數中。

(A | B) will give 61 which is 0011 1101

^

二進位異或運算符拷貝位，如果它被設置在一個操作數，但不能同時使用。

(A ^ B) will give 49 which is 0011 0001

~

二進制的補碼運算符是一元的，具有'翻轉'位的效果。

(~A ) will give -61 which is 1100 0011 in 2's complement form due to a signed binary number.

<<

二進制左移位運算符。左操作數的值被移動由右操作數指定的位數。

A << 2 will give 240 which is 1111 0000

>>

二進制右移運算。左操作數的值是正確的由右操作數指定的位數移動。

A >> 2 will give 15 which is 0000 1111

示例

試試下面的例子就明白了所有的D編程語言位運算符：

import std.stdio; int main(string[] args) { uint a = 60; /* 60 = 0011 1100 */ uint b = 13; /* 13 = 0000 1101 */ int c = 0; c = a & b; /* 12 = 0000 1100 */ writefln("Line 1 - Value of c is %d
", c ); c = a | b; /* 61 = 0011 1101 */ writefln("Line 2 - Value of c is %d
", c ); c = a ^ b; /* 49 = 0011 0001 */ writefln("Line 3 - Value of c is %d
", c ); c = ~a; /*-61 = 1100 0011 */ writefln("Line 4 - Value of c is %d
", c ); c = a << 2; /* 240 = 1111 0000 */ writefln("Line 5 - Value of c is %d
", c ); c = a >> 2; /* 15 = 0000 1111 */ writefln("Line 6 - Value of c is %d
", c ); return 0; }

當編譯並執行上面的程序它會產生以下結果：

Line 1 - Value of c is 12

Line 2 - Value of c is 61

Line 3 - Value of c is 49

Line 4 - Value of c is -61

Line 5 - Value of c is 240

Line 6 - Value of c is 15