想写一个数组里面五个IP地址，凡事192.168开头就说他们是同一局域网

Question

！！！好难好难：
主要是说，让用户输入5个字符串，是IP地址类似于192.168.50.3
下面是我要实现的OUTPUT：
嗯，使用C语言
Sample run of program should create the following output.

Sample run 1:
Enter 5 IP addresses in separate lines:
192.168.50.1
192.168.50.3
171.20.51.23
171.20.197.51
192.168.52.4
192.168.50.1 and 192.168.50.3 are in the same local network.

Sample run 2:
Enter 5 IP addresses in separate lines:
192.168.50.1
192.168.50.3
171.20.51.23
171.20.197.51
192.168.50.4
192.168.50.1 and 192.168.50.3 are in the same local network.
192.168.50.1 and 192.168.50.4 are in the same local network.
192.168.50.3 and 192.168.50.4 are in the same local network.

Answer 1

这个涉及子网掩码才能判断，你说的“192.168开头就说他们是同一局域网”只是子网掩码为255.255.0.0的特例