伪代码设计：如何健壮地查找列表中的最大值

Let maxNumber represent the biggest number, set it to zero to start
While there are still numbers left in the list
    Look at the next number in the list
    Compare it to the maxNumber
        If next number is smaller than maxNumber
            Set maxNumber to that number
Report maxNumber as the biggest in the list

Procedure FindBiggestNumber(List numbers)
    // 1. 检查列表是否为空，这是重要的边界情况
    If numbers is empty
        Report "Error: Cannot find biggest number in an empty list." and exit

    // 2. 将 maxNumber 初始化为列表的第一个元素
    Let maxNumber be the first element of numbers

    // 3. 遍历列表的其余元素（从第二个元素开始）
    For each number in numbers (starting from the second element)
        // 4. 比较当前元素与 maxNumber
        If number is greater than maxNumber
            // 5. 如果找到更大的数，更新 maxNumber
            Set maxNumber to number

    // 6. 循环结束后，maxNumber 即为列表中的最大值
    Report maxNumber as the biggest number in the list
End Procedure

def find_biggest_number(numbers_list):
    """
    在给定的数字列表中查找最大的数字。
    处理空列表和全负数列表的情况。
    """
    if not numbers_list:
        print("Error: Cannot find biggest number in an empty list.")
        return None

    # 初始化 max_number 为列表的第一个元素
    max_number = numbers_list[0]

    # 遍历列表的其余元素
    for i in range(1, len(numbers_list)):
        current_number = numbers_list[i]
        if current_number > max_number:
            max_number = current_number

    return max_number

# 测试案例
list1 = [5, 10, 2, 8, 15]
print(f"列表 {list1} 中的最大值是: {find_biggest_number(list1)}") # 预期输出: 15

list2 = [-5, -10, -2, -8, -1]
print(f"列表 {list2} 中的最大值是: {find_biggest_number(list2)}") # 预期输出: -1

list3 = [0, -1, 5, -3, 10]
print(f"列表 {list3} 中的最大值是: {find_biggest_number(list3)}") # 预期输出: 10

list4 = [7]
print(f"列表 {list4} 中的最大值是: {find_biggest_number(list4)}") # 预期输出: 7

list5 = []
print(f"列表 {list5} 中的最大值是: {find_biggest_number(list5)}") # 预期输出: Error... None