此程序实现的是一个运算器，是在一个程序的基础上进行改进的，计算器中需要的运算以及操作对象： IF,AND,OR,<,<=,>,>=,<>,=,== 数字0-9,(,),+,-,*,/, SIN,COS,TAN,POW,EXP,ABS,SQRT,INT,LN,LOG,MIN,MAX.-this program is a computing device that is in a process of improvement based on the