save project

diy2.py

@@ -6,9 +6,10 @@ 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，请重新输入！")
-    if name != userpassword:
+        continue
+    else: name != userpassword:
         print("密码输入错误，请重新输入！")
     print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")