Save the input data until user get changed
<p>I would like to know how to store the give input data and perform the calculations even after re-opening the program.</p>

<p>I am developing a college library management system, i would like know how to change the fine amount and store it for each day calculations by the ADMINISTRATOR and save this amount until he changes it again. Waiting for someones help.</p>

<p>Thank You.</p>
