While string should be used for working with strings, I would like to know what structure you should use in C++ when working with blocks of data.
I'm asking this because it would be nicer to use one parameter instead of passing a char* data and size_t size (or a custom structure).
std::vector<unsigned char>
or, preferably,
std::vector<std::uint8_t>
(In C++11, uint8_t can be found in <cinttypes>. Older compilers, but not MSVC, may have the C99 header <inttypes.h>. If your data is a sequence of 16-bit units, use uint16_t etc.)
If the size of the data blocks is known at compile time, std::array is appropriate; it wastes less space than vector.
There are a number of containers in the STL, not only vector. Look and choose what fits your situation.
The above solutions is good, but consider this solution may be good :
