查找某个范围内的最大值和后续值

def find_max_and_successor(arr, start, end):
    max_value = float('-inf')  # 初始化最大值为负无穷大
    max_index = -1  # 初始化最大值的索引为-1
    
    # 遍历给定范围内的数组
    for i in range(start, end+1):
        if arr[i] > max_value:
            max_value = arr[i]
            max_index = i
    
    # 获取最大值后续的值
    successor = None
    if max_index < len(arr) - 1:
        successor = arr[max_index + 1]
    
    return max_value, successor

# 示例用法
array = [1, 5, 3, 9, 2, 7, 4, 8]
start_index = 2
end_index = 5
max_value, successor = find_max_and_successor(array, start_index, end_index)
print("最大值:", max_value)
print("后续值:", successor)