Why my code is wrong? Give me the reason. unsigned float_neg(unsigned uf) { unsigned CaoNima = 0x80000000; unsigned Copy = uf>>23; Copy =uf&0xFF; if (uf & 0x7F800000 == 0x7F800000) { if (uf & 0x007FFFFF) { return uf; } else if (uf & 0x80000000) { return uf; } else { return uf; } } return uf^CaoNima; }