Converting int[] to String in C++

Question

I have a string defined as std::string header = \"00110033\"; now I need the string to hold the byte values of the digits as if its constructed like this

Answer 1

 char data_bytes[] = { 0, 0, 1, 1, 0, 0, 3, 3};
  std::string str;
 for(int i =0;i