nodes 交互

const rl = readline.createInterface({    input: process.stdin,    output: process.stdout,    prompt: '請輸入> '});rl.prompt();rl.on('line', function (line){    switch (line.trim()) {case 'hello':    console.log('world!');    break;        default:    console.log('你輸入的是:',line.trim());    break;}rl.prompt();}).on('close', function(){    console.log('再見!');process.exit(0);});