int a = 90;int b = 20;printf("交换之前 a = %d b = %d\n", a, b);a = a ^ b;b = a ^ b;a = a ^ b;printf("交换之后 a = %d b = %d\n", a, b);
int a = 90;int b = 20;printf("交换之前 a = %d b = %d\n", a, b);a = a ^ b;b = a ^ b;a = a ^ b;printf("交换之后 a = %d b = %d\n", a, b);
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