save project

diy2.py

@@ -6,10 +6,9 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if name!=username:
+    elif name!=username:
         print("用户名不存在，请重输")
-        continue
-    if password!=userpassword:
+    else:
         print("密码不正确，请重输")
     print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
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