用两个文件存储两个多项式的系数，用两个栈来表示这两个多项式，实现多项式的加、减、乘、除四种基本运算，再把结果输入到一个文件中。-Two files are stored with the coefficients of two polynomials, with two stacks to represent these two polynomials to achieve polynomial addition, subtractio