Commit fe50a3b0 by BellCodeEditor

save project

parent 7ad723db
Showing with 20 additions and 15 deletions
username = "python"
userpassword = "123456"
while True:
name = input("请输入用户名:")
password = input("请输入密码:")
if name == username and password == userpassword:
print("登录成功!")
break
if name != username:
print("用户名不存在,请重新输入!")
continue
if password != userpassword:
print("密码输入有误,请重新输入!")
print("欢迎来到贝尔编程!")
\ No newline at end of file
num_list = [1,3,5,8,11,15,17,18,20,21]
def erfen(num_list,num):
low = 0
high = len(num_list)-1
if num not in num_list:
print('在列表中找不到数据:' + str(num))
exit()
while low != high:
mid = (low+high)//2
nnum = num_list[mid]
if nnum == num:
return mid
elif nnum < num :
low = mid+1
elif nnum > num :
high = mid-1
return None
\ No newline at end of file
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