题解 | #IP地址转化#

package main

import (
	"strconv"
	"strings"
)

/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 *
 * @param ip string字符串
 * @return string字符串
 */
func IPtoNum(ip string) string {
	words := strings.Split(ip, ".")
	res := []string{}
	for i := 0; i < len(words); i++ {
		v, _ := strconv.Atoi(words[i])
		ans := strconv.FormatInt(int64(v), 2)
		for len(ans) < 8 {
			ans = "0" + ans
		}
		res = append(res, ans)
	}
	t := strings.Join(res, "")

	r1, _ := strconv.ParseUint(t, 2, 64)

	return strconv.FormatUint(r1, 10)

}