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#include <stdio.h>
int main(int argc, char *argv[])
{
int a = 2, b = 6;
a = a ^ b;
b = b ^ a;
a = a ^ b;
printf("a = %d b = %d\n", a, b);
return 0;
}
½á¹ûÈçÏÂ: a = 6 b = 2
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ÔÙÖ´ÐеÚÈý¸ö¸³ÖµÓï¾ä£º“a = a ^ b”¡£ÓÉÓÚaµÄÖµµÈÓÚ(a ^ b)£¬bµÄÖµµÈÓÚ(b ^ a ^ b)£¬Òò´Ë£¬Ï൱ÓÚa = a ^ b ^ b ^ a ^ b£¬¼´aµÄÖµµÈÓÚa ^ a ^ b ^ b ^ b£¬µÈÓÚb¡£
ÁíÍâÁ½ÖÖ·½·¨:
·½·¨Ò»:
void swap(int *p, int *q)
{
*p = *p + *q;
*q = *p - *q;
*p = *p - *q;
}
·½·¨¶þ:
void swap(int *p, int *q)
{
*p = *p + *q - (*q = *p);
}
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×¢:¿ÉÒÔ°ÑÒì»òµÄÈýÌõÓï¾äѹËõΪһÌõ£ºa ^= b ^= a ^= b;
Òª½»»»Èý¸ö±äÁ¿µÄÖµ,ÓÃÏÂÃæ±äÁ¿»á±¨´í:c = a + c - (a = b, b = c);
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#include <stdio.h>
int main(int argc, char *argv[])
{
int a = 1;
int b = 2;
int c = 3;
c = a + c - (a = b, b = c);
printf("a = %d\n", a);
printf("b = %d\n", b);
printf("c = %d\n", c);
return 0;
}
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