a = [9, 34, 7, 26, 20, 16, 24, 149, 40, 41]
k = int(input("请输入想要查找的数字： "))
find = 0
for i in range(len(a)):
if (a[i] == k):
print("找到啦，你找的数是 a 中第 "+str(i)+" 个数") # 如果找到了
find = 1
break
if (find == 0): # 如果没找到
print("没找到你要的数字")