Hi all I’m sorry with inconvenience with my last mail, it’s just my first to write in a mail list. I’ve fixed some issues with my code but now it may run completely, I would be thankful if anyone has some free time to give a feedback to my fixed code and tell me if any issues. code https://github.com/islam-taha/stdVector/blob/master/vector.cpp https://github.com/islam-taha/stdVector/blob/master/vector.cpp . thanks in advance Islam