实现一个简单计算器和一个精准定时器，相关结合的多功能工具栏。对于计算器，其类似于Windows附件中自带的计算器。这个计算器不仅实现了简单的四则运算功能，还实现了一些高级的科学计算功能，而且具有简洁大方的图文外观。即时准确地获得需要的计算的结果-To achieve a simple calculator and an accurate timer, related to a combination of multi-function toolbar. Similar to the calculator that comes with the Windows accessory calculator. This calculator is not only a simple four computing capabilities, but also to achieve a number of advanced scientific computing capabilities, and has a simple elegant graphic appearance. Timely and accurate access to the results of the calculation