Question

I need to read and write binary data in C++.I use from ofstream and ifstream classes but it can’t read some chars like 9,13,32.If is there another way to read and write theme.

Answer 1

Here is a program that does this:

#include <iostream>
#include <fstream>

int main(int argc, const char *argv[])
{
   if (argc < 2) {
      ::std::cerr << "Usage: " << argv[0] << "<filename>\n";
      return 1;
   }
   ::std::ifstream in(argv[1], ::std::ios::binary);
   while (in) {
      char c;
      in.get(c);
      if (in) {
         ::std::cout << "Read a " << int(c) << "\n";
      }
   }
   return 0;
}

Here is an example of it being run in Linux:

$ echo -ne '\x9\xd\x20\x9\xd\x20\n' >binfile
$ ./readbin binfile 
Read a 9
Read a 13
Read a 32
Read a 9
Read a 13
Read a 32
Read a 10