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nevada

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swap values without temporary variable

The XOR swap algorithm is an inefficient method of swapping two variables. http://en.wikipedia.org/wiki/Xor_swap_algorithm

void XORSwap(void *x, void *y)
{
   *x ^= *y;
   *y ^= *x;
   *x ^= *y;
}
to c swap algorithm values by nevadalife on Sep 23, 2006 1 Comments

Bit Counting and clever loop condition

unsigned bit_count(unsigned x) {
    unsigned n;
    for (n = 0; x; n++)
        x &= x-1;
    return n;
}
to c bits count algorithm by nevadalife on Sep 23, 2006
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