save project

diy2.py

@@ -8,8 +8,10 @@ while True:
         break
     elif name!=username:
         print("用户名不存在，请重新输入")
+        continue
     elif password!=userpassword:
         print("密码错误，请重新输入")
+        continue
     else: 
         print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
\ No newline at end of file