auto save

diy2.py

 username = "chenHT"
 userpassword = "441702200801051773"
 while True:
+    if i>0 :
     name = input("请输入用户名:")
     password = input("请输入密码:")
     if name == username and password == userpassword:
         break
         print("登录成功!")
-    print("用户名或密码错误!请重新输入")
+    if name != username:
+        print("用户名错误，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!")
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