第23257题
以下哪个位运算可以无需临时变量交换两个变量的值?
A
a = a ^ b; b = a ^ b; a = a ^ b;
B
a = a & b; b = a | b; a = a & b;
C
a = a | b; b = a ^ b; a = a ^ b;
D
a = ~a; b = ~b; a = ~a;
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答案解析