例:intj=-32768:j的存储形式为32768的反码加1 1514131211109876543210 1000000000000000 求反 1514131211109876543210 11111 11 15141312111098765432 0 100000000000000015 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 例: int j=-32768; j的存储形式为32768的反码加1: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 求反 加1