编写一个程序,找出一维数组中元素的最大值,最小值及其差值

好的，下面是 Python 代码实现：

def find_max_min_diff(arr):
    max_val = arr[0]
    min_val = arr[0]
    for i in range(1, len(arr)):
        if arr[i] > max_val:
            max_val = arr[i]
        if arr[i] < min_val:
            min_val = arr[i]
    diff = max_val - min_val
    return max_val, min_val, diff

# 示例用法
arr = [3, 7, 2, 1, 8, 4, 5]
max_val, min_val, diff = find_max_min_diff(arr)
print("数组的最大值为：", max_val)
print("数组的最小值为：", min_val)
print("数组的差值为：", diff)

输出结果为：

数组的最大值为： 8
数组的最小值为： 1
数组的差值为： 7