package main

import (
	"fmt"
	"net"
)

func checkIP(ipAddress string) {
地址 := net.ParseIP(ipAddress)
	if 地址 != nil {
		fmt.Printf("%s is a valid IP address\n", ipAddress)
	} else {
		fmt.Printf("%s is not a valid IP address\n", ipAddress)
	}
}

func main() {
	checkIP("192.168.1.1")
	checkIP("256.1.1.1")
}

package main

import (
	"bufio"
	"fmt"
	"net"
	"os"
)

func checkIP(ipAddress string) {
	地址 := net.ParseIP(ipAddress)
	if 地址 != nil {
		fmt.Printf("%s is a valid IP address\n", ipAddress)
	} else {
		fmt.Printf("%s is not a valid IP address\n", ipAddress)
	}
}

func main() {
	reader := bufio.NewReader(os.Stdin)
	fmt.Print("Enter an IP address: ")
	ipAddress, _ := reader.ReadString('\n')
	ipAddress = ipAddress[:len(ipAddress)-2] // remove \r\n
	checkIP(ipAddress)
}