Compress/Extract IPv4 address in golang

main.go

package main

import (
	"fmt"
)

func main() {
	ip := "192.168.0.1"

	encodedIP := Encode(ip)

	fmt.Println("Encode: " + ip)
	fmt.Println(encodedIP)
	fmt.Printf("Decode: %d\n", encodedIP)
	fmt.Println(Decode(encodedIP))
}

func Decode(encoded int) string {
	a := (encoded >> 24) & 0xFF
	b := (encoded >> 16) & 0xFF
	c := (encoded >> 8) & 0xFF
	d := encoded & 0xFF

	return fmt.Sprintf("%d.%d.%d.%d", a, b, c, d)
}

func Encode(ip string) int {
	var nums [4]int
	
	_, err := fmt.Sscanf(ip, "%d.%d.%d.%d", &nums[0], &nums[1], &nums[2], &nums[3])
	if err != nil {
		panic(err)
	}

	return (nums[0] << 24) | (nums[1] << 16) | (nums[2] << 8) | nums[3]
}