编写一个程序，实现两个一元多项式相加。要求：

(1)多项式用链表存储

(2)多项式相加必须使用单独的函数实现

(3)输入时只要求输入各项的系数和指数

(4)结果输出形式如下

F(x) = an*x^n + an-1*x^(n-1) + … + a1x + a0

-The preparation of a program to realize the sum of two polynomials a dollar. Requirements: (1) polynomial using linked list storage (2) the sum of polynomial to use a separate function (3) input only requires the input of the coefficient and index (4) the results of the output format is as follows F (x ) = an* x ^ n+ an-1* x ^ (n-1)+ ...+ a1x+ a0