执行以上语句后，a和b的值分别为多少？

Question

int a=3,b=4;
a=a^b;b=b^a;
a=a^b;

Answer 1

^表示按位异或运算符
a=3,b=4,转换为二进制就是a=0011,b=0100,
a = a ^ b = 0011 ^ 0100 = 0111
b = b ^ a = 0100 ^ 0111 = 0011 = 3
a = a ^ b = 0111 ^ 0011 = 0100 = 4