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【单选题】
逻辑“异或”运算可描述为“ a xor b ”,其中 a 和 b 为参加运算的两个操作数,运算结果为当且仅当 a 、 b 两个操作数中只有一个为为真,其他情况下均为假。以下表达式中 _____ 可以正确表示逻辑“异或”运算。
A.
a||b
B.
(a&&b)&&!(a||b )
C.
a&&b
D.
(a||b ) &&! (a&&b)
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