说明： 移植到嵌入式上的科学计算器，ucgui界面。c语言编写。克服了有的环境下对动态分配内存及数据类型转化支持不够的问题
(Ported to embedded scientific calculator, ucgui interface. c language. Environment to overcome some of the dynamic allocation of memory and data type conversion support for the issue of not enough)
