auto save

diy2.py

-
 username = "python"
 userpassword = "123456"
 while True:
@@ -6,5 +5,9 @@ while True:
     password = input("请输入密码:")
     if name == username and password == userpassword:
         print("登录成功!")
-    print("用户名和密码错误!请重新输入")
+        break
+    if name != username:
+        print("用户名错误")
+    if password != userpassword:
+        print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
\ No newline at end of file