计算两数之间之和，希望对入门者有所帮助.程序不是很长，主要就是讲了一个循环语句的用法。-Calculated between the number of the sum of the two, want to help beginners. Program is not very long, is mainly talked about the usage of a loop statement.

程序功能：用单链表存储多项式并实现两个多项式相加-Program features: single-chain storage and realization of the polynomial sum of two polynomials