import Foundation

struct Entity {
    let ID, name: String
    func verify() -> Bool {
        // 以下的内容将能够判断名为 ID 的字符串是否满足13位数字的情况，可以直接照搬
        let reFormula = try! NSRegularExpression(pattern: "^\\d{13}$", options: [NSRegularExpression.Options.anchorsMatchLines])
        let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
        let matchList = reFormula.matches(in: ID, range: matchRange)
        if matchList.count != 1 {
            return false
        }
        return true
    }
}

var fly = Entity(ID: "0000000000987", name: "蒼蠅")
fly.verify()

var xiaoming = Entity(ID: "20211145145141919810", name: "可利斯")
xiaoming.verify()