save project

diy1.py

@@ -7,4 +7,5 @@ while True:
     if username==name and userpassword==password:
     if username==name and userpassword==password:
         print("登陆成功")
         print("登陆成功")
         break
         break
-
+    if name != username:
+        print("用户名不存在")