How to convert vector<unsigned char> to int?

Question

I have vector<unsigned char> filed with binary data. I need to take, lets say, 2 items from vector(2 bytes) and convert it to integer. How this could be done not in C style?

Answer 1

Please use the shift operator / bit-wise operations.

int t = (v[0] << 8) | v[1];

All the solutions proposed here that are based on casting/unions are AFAIK undefined behavior, and may fail on compilers that take advantage of strict aliasing (e.g. GCC).