what is the purpose of the following code, and is there any problem with the c

what is the purpose of the following code, and is there any
problem with the code?

void fn(long* p1, long* p2)
{ register int x = *p1;
register int y = *p2;
x ^= y;
y ^= x;
x ^= y;
*p1 = x;
*p2 = y;
}

Question Posted / mcaibyz2

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what is the purpose of the following code, and is there any problem with the code? void fn(long..

Answer / senthil

exchanges "long data type" values referenced by pointers p1 and p2

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