写代码：实现用户输入用户名和密码，当用户名为seven且密码为123时，显示登录成功，否则失败，失败时允许重复输入三次。

Posted 2021-01-20 demilyc

#  实现用户输入用户名和密码，当用户名为seven且密码为123时，显示登录成功，否则失败，失败时允许重复输入三次。


count = 0

while count < 3:
    username = input("Please enter your username: ")
    password = input("Please enter your password: ")
    if username == "seven" and password == "123":
        print("login successful.")
        break
    else:
        print("login failed.")
    count += 1

if count == 3:
    print("the max input is 3 times. ")