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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
·ÖÎö£ºÇ°Á½¸ö¸³ÖµÓï¾ä£º“a = a ^ b£»”ºÍ“b = b ^ a£»”Ï൱ÓÚb = b ^ (a ^ b)£¬¶øb ^ a ^ bµÈÓÚa ^ b ^ b¡£b ^ bµÄ½á¹ûΪ0£¬ÒòΪͬһ¸öÊýÓëÏàÏòÏà^£¬½á¹û±ØÎª0¡£Òò´ËbµÄÖµµÈÓÚa ^ 0£¬¼´a£¬ÆäֵΪ2¡£
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);
}
Ô­ÀíΪËãÊõÔËËã·ûµÄ½áºÏ˳ÐòΪ×Ô×óÖÁÓÒ¡£
×¢:¿ÉÒÔ°ÑÒì»òµÄÈýÌõÓï¾äѹËõΪһÌõ£ºa ^= b ^= a ^= b;
Òª½»»»Èý¸ö±äÁ¿µÄÖµ,ÓÃÏÂÃæ±äÁ¿»á±¨´í:c = a + c - (a = b, b = c);
ÏÂÃæÀ´·ÖÎöһϣ¬ÏÈ¿´Ò»¸öʾÀý³ÌÐò£¬ÈçÏ£º
#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;
}
±àÒëÔËÐУ¬½á¹ûÈçÏ£ºa = 2 b = 3 c = 2
¿É¼û£¬×î³õÄ¿±êÖеÄc = 1²¿·ÖûÄÜʵÏÖ¡£ÓÚÊÇ·ÖÎöÔ­Òò£º


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