save project

diy2.py

 username = "python"
 userpassword = "123456"
+number=3
 name = input("请输入用户名:")
 while name != username:
+    number-=1
     print("用户名错误")
     name=input("请输入用户名:")
+    if number==0:
+    exit()
 password=input("请输入密码")
 while password != userpassword:
     print("密码错误") 
+    number-=1
+    if number==0:
+    exit()
     password=input("请输入密码") 
 if name == username and password == userpassword:
     print("登录成功!")
-    print("欢迎来到贝尔编程!")
\ No newline at end of file
+    print("欢迎来到贝尔编程!")
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