数据结构实现两个多项式的加法,首先输入两个多项式,如"5,8",代表5x^8,以"0,0"结束,结束后输出两个多项式相加的和-Data structure to achieve the addition of two polynomials, first enter the two polynomials, such as " 5,8" , on behalf of 5x ^ 8, to " 0,0"　end, after the end of the output sum of two polynomials and