代码实现了华氏度及摄氏度之间温度转换,并使用了滚动条显示比例。对象间利用callback参数相互调用。是学习面向对象编程的极好的例子。-Code between the Fahrenheit and Celsius temperature conversion, and use the scroll bar shows the proportion of. Objects call each other using callback parameters. Learning object-ori