问题描述
We have to make a dummy database that will store documents. A User Interface Shoud be there containing options
1)display pdf doc
2)update pdf doc.
After the user logins. For the update option, the user will upload the doc or the changes in the doc and then that changes/doc should go to the administrator for their approval and then it will be updated. The old doc then go to the archives in another database.
我尝试过：
i已经尝试了但是我无法执行所需的任务
What I have tried:
i have tried it but i m not able to perform the required task
推荐答案
我试过了但是我无法执行所需的任务
i have tried it but i m not able to perform the required task
要在这里获得一些帮助，你必须展示你的工作并解释你遇到的问题。
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HomeWork不会测试你乞求别人做你的工作的技巧，它是让您思考并帮助您的老师检查您对所学课程的理解以及您应用这些课程时遇到的问题。
你的任何失败都会帮助你的老师发现你的弱点并设定补救措施。
你的任何失败都会帮助你了解什么有效，什么无效，被称为'试错'学习。
所以，试一试，重读课程并开始工作。如果您遇到特定问题，请展示您的代码并解释这个问题，我们可能会提供帮助。
To get some help here, you must show your work and explain the problem you have.
HomeWork problems are simplified versions of the kind of problems you will have to solve in real life, their purpose is learning and practicing.
We do not do your HomeWork.
HomeWork is not set to test your skills at begging other people to do your work, it is set to make you think and to help your teacher to check your understanding of the courses you have taken and also the problems you have at applying them.
Any failure of you will help your teacher spot your weaknesses and set remedial actions.
Any failure of you will help you to learn what works and what don't, it is called 'trial and error' learning.
So, give it a try, reread your lessons and start working. If you are stuck on a specific problem, show your code and explain this exact problem, we might help.
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