IP 地址转换为十进制，反之亦然

假设我的十进制数是9766322441所以它对应的是70.30.65.9但是当这个IP地址IC转换回来时，它给出了一些不同的十进制数1176387849...当我转换 google.com 的 IP 地址时，即64.233.187.99然后它给出1089059683反向转换给出正确的IP地址，即64.233.187.99 ...

我的问题是上面提到的数字有什么问题？我也尝试与9579342332但结果相同。它给出了错误的反向转换？

背后的原因是什么？？

你可以使用这个计算器 http://www.ipaddresslocation.org/convertip.php用于计算。

您的值不正确，70.30.65.9 将与 1176387849 对应，但永远不会与 9766322441 对应。

32 位的限制 -Java：如何将十进制转换为32位int？ https://stackoverflow.com/questions/4984130/java-how-to-convert-dec-to-32bit-int

C++ 将 IP 转换为十进制的示例：

#include <iostream.h>

main()
{
    // Initialize the variables
    unsigned long a,b,c,d,base10IP;

    // Get the IP address from user
    cout << "\nEnter an IP address in dotted quad notation (x.x.x.x)";
    cout << "\nwith each section seperated by a space: ";
    cin >> a >> b >> c >> d;

    // Do calculations to convert IP to base 10
    a *= 16777216;
    b *= 65536;
    c *= 256;
    base10IP = a + b + c + d;

    // Output new IP address
    cout << "\nThe converted address is: " << base10IP << '\n';
   }

This is JAVA class to convert IP to decimal: -

/**
 * @author Charles Johnson
 * from http://www.technojeeves.com/joomla/index.php/free/58-convert-ip-address-to-number
*/
public class IpConverter {
  public static void main(String[] args) {
    System.out.println(longToIp(Long.valueOf(args[0], 16)));
  }

  public static String toHex(String ipAddress) {
    return Long.toHexString(IpConverter.ipToLong(ipAddress));
  }

  public static long ipToLong(String ipAddress) {
    long result = 0;
    String[] atoms = ipAddress.split("\\.");

    for (int i = 3; i >= 0; i--) {
        result |= (Long.parseLong(atoms[3 - i]) << (i * 8));
    }

    return result & 0xFFFFFFFF;
  }

  public static String longToIp(long ip) {
    StringBuilder sb = new StringBuilder(15);

    for (int i = 0; i < 4; i++) {
        sb.insert(0, Long.toString(ip & 0xff));

        if (i < 3) {
            sb.insert(0, '.');
        }

        ip >>= 8;
    }

    return sb.toString();
  }
}

Another JAVA example to convert IP to decimal: - String ip="70.30.65.9"; String[] addrArray = ip.split("\."); long num = 0; for (int i = 0; i PHP function to convert IP to decimal: - function myip2long($ip) { if (is_numeric($ip)) { return sprintf( "%u", floatval($ip) ); } else { return sprintf( "%u", floatval(ip2long($ip) )); } } Try applying it, e.g.: echo myip2long("192.168.1.1");
Another example in PHP to convert IP to decimal: - function myip2long2($ip){ $d = 0.0; $b = explode(".", $ip,4); for ($i = 0; $i PHP example to convert decimal to IP: - function customLong2ip($ip){ $b=array(0,0,0,0); $c = 16777216.0; $ip += 0.0; for ($i = 0; $i