利用对话框实现科学计算器。可完成：基础计算、科学计算、以及数理统计。-Use the dialog box to scientific calculators. Completed: basic computing, scientific computing, and mathematical statistics.

一个简易的班级成绩统计系统,可以在此基础上做一个完善的统计处理系统-Performance statistics system, a simple class can do it on the basis of a sound statistical processing system,,