auto save

diy1.py

@@ -8,11 +8,12 @@ while True:
     if a == username and o==userpassword:
         print("登陆成功")
         break
-    if a != username:
+    elif a != username:
         print("账号错误")
         continue
-    if o !=userpassword:
+    else:
         print("密码错误")
+        
 print("欢迎来到编程世界")     
     
 # 如果用户输入的账号、密码正确，提示登陆成功