auto save

diy2.py

@@ -6,8 +6,8 @@ while True:
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登录成功!")
         print("登录成功!")
         break
         break
-if name!="username":    
+    elif name!="username":    
         print("用户名错误!请重新输入")
         print("用户名错误!请重新输入")
-if password!="password":    
+    else password!="password":    
         print("密码错误!请重新输入")
         print("密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")