save project

diy2.py

@@ -8,7 +8,10 @@ while True:
     if username==zh and userpassword==mm:
         print("登陆成功")
         break   
-    else:
-        print("登陆失败")
+    if username != zh:
+            print("账号错误")
+            continue
+    if userpassword != mm:
+            print("密码错误")
 print("欢迎来到贝尔编程")
     
\ No newline at end of file