实现多项式表达式的运算器利用栈实现表达式计算器的模板类；用表达式计算器类和多项式类实现多项式表达式的计算器-polynomial expressions for the use of the computing stack to achieve expression calculator template; Using expressions like calculators and polynomial type polynomial expressions Calculator

多项式运算器，可以实现基本的加减乘除，微分，定积分，不定积分，支持10个存储-Polynomial calculator, you can achieve the basic addition and subtraction, multiplication and division, differentiation, definite integral, indefinite integral, to support 10 stores