[C] Comparisons versus XOR

You're parsing arguments and they are mutually exclusive.


if ((A == 0 && B == 0) || (A != 0 && B!= 0))
 return EXIT_FAILURE;

 versus


if ((A ^ B) == 0)
 return EXIT_FAILURE;

>>14
From the first example given by the OP you should be able to get that he's parsing two arguments and only one is accepted into his shit.