Some insights on Rewriting virtual functions

Someone's code was read to complete TCP/IP jobs. The idea is good, but the code is a bad one! If you do not have the necessary strength or have a deep understanding of the implementation principles, do not try to rewrite the virtual functions (especially the C ++ destructor such as onclose, the self-called destructor of the system are better than the Destructor written by most cainiao, even though the class is built by cainiao itself). Otherwise, let's wait for various crashes. It is good to think about releasing the space occupied by the temporary variables at the end, but you can add a few Delete before calling the built-in end function. Do you want to rewrite the virtual function ?!

Also, you can write "include 'header files' in CPP, and write the dry hair to the header file attached to CPP.

I used to go to duniang to find the corresponding direct example when I was lazy. I found hundreds of errors in the document and didn't directly post the code, it was done only when I tried to correct the original author's mistakes. For more information, see the document.