Compressing text files with bzlib library using C++

How to compress text files using bzlib library in bzip2. I am not getting it, anyone to assist with the coding in C++. .i read through bzip2 manual bzip.org/1.0.5/bzip2-manual-1.0.5.html#libprog but cant figure it out. pls assist

What am trying to do in the main project is: I read a rexr file and get the size in bytes, then i compress the same text file using bzip2 library and get the compressed size of the file.

for example : having test.txt as input and it must give me text.txt.bz2

here is what i have so far:

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
#include "bzlib.h"

using namespace std;

using std::cout;
using std::cin;


int _tmain(int argc, _TCHAR* argv[])

{
  
   fstream file;
   ifstream::pos_type size;
   ifstream::pos_type size2;
   char * memblock;

  ifstream file ("C:\\test.txt", ios::in|ios::binary|ios::ate);
  if (file.is_open())
  {
    size = file.tellg();
    memblock = new char [size];
    file.seekg (0, ios::beg);
    file.read (memblock, size);
    file.close();
    cout<<size; // size of the text file  
  
    }
  
     // compress with bzip2 
      
    
      int BZ2_bzCompress (bz_stream *stream, int action);
    
      
    
    // get the size of the compressed text file
    
     
}

Tags: C++