1 实验描述：create edit boxes and realize the operation like addition, subtraction, multiplication and division.
2 Same as the previous article, create a new project.
3 Same as the previous article, add the controls required by the title to the resource file Diglog.
4 Same as the previous article, add types for class members.
5 Same as the previous article, add functions for each control. The following figure is a function that realizes the Addition function:
6 The result is as follows:
