I use the basic_string class in my code:

string mystring;
mystring += "abc";
mystring += "d";

Is there is something like basic_string but for BYTES (not string)?
I want this array to contain non-readable bytes.
Something like this:

array myarray;
myarray +=0x12;
myarray +=0x00; // NULL!!
myarray +=0x01;