save project

diy2.py

@@ -6,9 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if name != username:
-        print("用户名不存在，请重新登录。")
-        continue
-    if password != userpassword:
+    elif name != username:
+        print("用户名不存在，请重新输入。")
+    else :
         print("密码不正确，请重新登录。")      
 print("欢迎来到贝尔编程!")
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