Convert string to a large integer?
<p>I have an assignment (i think a pretty common one) where the goal is to develop a LargeInteger class that can do calculations with.. very large integers. </p>

<p>I am obviously not allowed to use the <code>Java.math.bigeinteger</code> class at all.</p>

<p>Right off the top I am stuck. I need to take 2 Strings from the user (the long digits) and then I will be using these strings to perform the various calculation methods (add, divide, multiply etc.)</p>

<p>Can anyone explain to me the theory behind how this is supposed to work? After I take the string from the user (since it is too large to store in int) am I supposed to break it up maybe into 10 digit blocks of long numbers (I think 10 is the max long maybe 9?) </p>

<p>any help is appreciated. </p>
