const rl = require("readline").createInterface({ input: process.stdin, output: process.stdout, }); var iter = rl[Symbol.asyncIterator](); const readline = async () => (await iter.next()).value; // 判断ip是否合法 function ipValid(ip) { // 可进一步优化 const reg = /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}...