用二进制加法器对二—十进制编码的十进制数求和,当和的本位十进制数二—十进制编码小于等于1001且向高位无进位时,
44 ;当和小于等于1001且向高位有进位时, 45
;当和大于1001时, 46 。 The Internet is an open system,and most information is available to
everyone. It is very important to addto existing system for protecting the secret information.