
def search(arr, n, x):

    for i in range(0, n):
        if (arr[i] == x):
            return i
    return -1


# 在数组 arr 中查找字符 D
arr = ['A', 'B', 'C', 'D', 'E']
x = 'D'
n = len(arr)
result = search(arr, n, x)
if(result == -1):
    print("元素不在数组中")
else:
    print("元素在数组中的索引为", result)
