```
package main
import (
"fmt"
"strconv"
"strings"
)
func main() {
fmt.Println(isBelong(`10.187.102.8`, `10.187.102.0/24`))
}
func isBelong(ip, cidr string) bool {
ipAddr := strings.Split(ip, `.`)
if len(ipAddr) < 4 {
return false
}
cidrArr := strings.Split(cidr, `/`)
if len(cidrArr) < 2 {
return false
}
var tmp = make([]string, 0)
for key, value := range strings.Split(`255.255.255.0`, `.`) {
iint, _ := strconv.Atoi(value)
iint2, _ := strconv.Atoi(ipAddr[key])
tmp = append(tmp, strconv.Itoa(iint&iint2))
}
return strings.Join(tmp, `.`) == cidrArr[0]
}
```
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