ipClass2num = { 'A':0, 'B':0, 'C':0, 'D':0, 'E':0, 'ERROR':0, 'PRIVATE':0, } # 私有IP地址和A,B,C,D,E类地址是不冲突的,也就是说需要同时+1 def check_ip(ip:str): ip_bit = ip.split('.') if len(ip_bit) != 4 or '' in ip_bit: #ip 的长度为4 且每一位不为空 return False for i in ip_bit: if int(i)<0 or int(i) >255: #检查Ip每一个10位的值范围为0~255 return False return True def check_mask(mask:str): if not check_ip(mask): return False if mask == '255.255.255.255' or mask == '0.0.0.0': return False mask_list = mask.split('.') if len(mask_list) != 4: return False mask_bit = [] for i in mask_list:#小数点隔开的每一数字段 i = bin(int(i))#每一数字段转换为每一段的二进制数字段 i = i[2:] #从每一段的二进制数字段的第三个数开始,因为前面有两个ob mask_bit.append(i.zfill(8)) #.zfill:返回指定长度的字符串,原字符串右对齐,前面填充0 whole_mask = ''.join(mask_bit) # print(whole_mask) whole0_find = whole_mask.find("0")#查0从哪里开始 whole1_rfind = whole_mask.rfind("1")#查1在哪里结束 if whole1_rfind+1 == whole0_find:#两者位置差1位为正确 return True else: return False def check_private_ip(ip:str): # 三类私网 ip_list = ip.split('.') if ip_list[0] == '10': return True if ip_list[0] == '172' and 16<=int(ip_list[1])<=31: return True if ip_list[0] == '192' and ip_list[1] == '168': return True return False while True: try: s = input() ip = s.split('~')[0] mask = s.split('~')[1] if check_ip(ip): first = int(ip.split('.')[0]) if first==127 or first==0: # 若不这样写,当类似于【0.*.*.*】和【127.*.*.*】的IP地址的子网掩码错误时,会额外计数 continue if check_mask(mask): if check_private_ip(ip): ipClass2num['PRIVATE'] += 1 if 0<first<127: ipClass2num['A'] += 1 elif 127<first<=191: ipClass2num['B'] += 1 elif 192<=first<=223: ipClass2num['C'] += 1 elif 224<=first<=239: ipClass2num['D'] += 1 elif 240<=first<=255: ipClass2num['E'] += 1 else: ipClass2num['ERROR'] += 1 else: ipClass2num['ERROR'] += 1 except: break for v in ipClass2num.values(): print(v,end=(' '))