unsigned char std :: vector to unsigned char []？

Question

Simple question, how does one create a function which takes an unsigned char std::vector and spits out an unsigned char[] with a length . Thanks!

Ah, well it seems my problem was my knowledge of std::vector. I always believed that std::vector did not hold its values in linear fashion. That solves a lot of my problems. Thanks!

Answer 1

Just use: &v.front() .

If you need a copy use std::copy .

Answer 2

Unfortunately, it's not a one liner, but it's not too bad:

 std::vector<unsigned char> v(10);
 unsigned char* a = new unsigned char[v.size()];
 std::copy(v.begin(), v.end(), a);
 delete [] a;