【文件属性】：
文件名称：IP和十进制数互转，使用Java实现。
文件大小：4KB
文件格式：JAVA
更新时间：2022-05-16 04:31:58
IP 二进制 十进制 32位 Java
Take the following IPv4 address: 128.32.10.1
This address has 4 octets where each octet is a single byte (or 8 bits).
1st octet 128 has the binary representation: 10000000
2nd octet 32 has the binary representation: 00100000
3rd octet 10 has the binary representation: 00001010
4th octet 1 has the binary representation: 00000001
So 128.32.10.1 == 10000000.00100000.00001010.00000001
Because the above IP address has 32 bits, we can represent it as the unsigned 32 bit number: 2149583361
Complete the function that takes an unsigned 32 bit number and returns a string representation of its IPv4 address.
Examples
2149583361 ==> "128.32.10.1"
32 ==> "0.0.0.32"
0 ==> "0.0.0.0"