记录类的信息

代码说明：

  可以设计一个轿车类，它具有颜色、牌照、品牌等属性。打开文件，使用文件输出流，将成员变量的值输入到文件中，记录若干个汽车的属性。(You can design a car class, it has color, license plate, brand and other attributes. Open the file, use the file output stream, enter the value of the member variable into the file, and record the attributes of several cars.)