说明：  初学matlab课程的作业，本程序是在Matlab R2009b环境下编写的一个计算器的小程序，包括加法，减法，YmhdPU计算，qlmaSbQ计算，是Matlab的GUI编程的很好例子。
(Jobs matlab beginner courses, the program is written in Matlab R2009b environment of a small calculator program, including addition, subtraction,YmhdPU computing, qlmaSbQ calculations Matlab GUI programming is a good example. )