text: const repl = require('repl');
  const r = repl.start({
  	prompt: '他说:',
  	eval: (cmd, context, filename, cb) => {
  		cb(null, cmd);
  	},
  	writer:  output => output.toUpperCase()
  });
  
  r.on('exit', () => {
  	console.log('exited');
  });
  r.on('reset', () => {
  	console.log('reseted');
  });