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。...

#  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. ")

转载于:https://www.cnblogs.com/demilyc/p/9975744.html