编写一组程序，基于单链表，实现一元多项式的加法运算。多项式加法举例： p1=3x^3+5x^2+4x p2=×^5+3x^2 p1+p2=x^5+3x^3+8x^2+4x 输入：从大到小依次输入所要输入的两个一元多项式的系数和指数

为了编写一组程序，用于一元多项式的加法，我们可以创建一个Node类表示多项式的项，然后构建两个链表分别存储两个多项式的系数和指数。以下是使用Python语言的一个简单示例：

class ListNode:
    def __init__(self, coefficient, exponent):
        self.coefficient = coefficient
        self.exponent = exponent
        self.next = None

def add_coefficients(coeff1, coeff2):
    result = 0
    if coeff1 > 0 and coeff2 > 0:
        result = coeff1 + coeff2
    elif coeff1 < 0 and coeff2 < 0:
        result = coeff1 - coeff2
    else:
        result = max(coeff1, coeff2)  # 如果一个为零，另一个非零，则取绝对值大的那个作为结果
    return abs(result)

def polynomial_addition(list1, list2):
    head = ListNode(0, 0)
    current = head
    carry = 0

    while list1 is not None or list2 is not None:
        if list1 is not None:
            term1_coeff = list1.coefficient
            list1 = list1.next
        else:
            term1_coeff = 0

        if list2 is not None:
            term2_coeff = list2.coefficient
            list2 = list2.next
        else:
            term2_coeff = 0

        product = add_coefficients(term1_coeff, term2_coeff) + carry
        current.next = ListNode(product % 10, 1 if product >= 10 else 0)  # 如果当前位数大于等于10，进位一位
        carry = product // 10
        current = current.next

    # 将最后可能存在的进位处理在链表末尾
    if carry > 0:
        current.next = ListNode(carry, 1)

    return head.next

# 示例输入
list1 = ListNode(3, 3)  # 3x^3
list1.next = ListNode(5, 2)  # 5x^2
list1.next.next = ListNode(4, 1)  # 4x

list2 = ListNode(0, 5)  # x^5 (0系数可以忽略)
list2.next = ListNode(3, 2)  # 3x^2

# 加法操作
result = polynomial_addition(list1, list2)

在这个例子中，我们首先创建了`ListNode`类来存储每个多项式的系数和指数。`polynomial_addition`函数逐项相加，并处理进位。最后返回的是加法后的链表头部。