说明：  用matlab GUI编写的科学计算器程序，可以实现各进制的相互转换，进行逻辑运算，三角函数运算，幂运算，均值，标准差及方差运算等
(this is a scientific calculator that was programmed by matlab GUI。its functions conclude hexadecimal conversion,logical operations,trigonometric,exponentiation,mean,standard deviation and variance computing etc.)