save project

diy1.py

@@ -7,6 +7,9 @@ while True:
     if name == username and password == userpassword:
         print("登录成功")
         break
-    else:
-        print("登录错误,请重试") 
+    if name != username:
+        continue
+        print("账号不存在,请重试") 
+    if password != userpassword:
+        print("密码错误,请重试") 
 print("欢迎来到贝尔编程！！！") 
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