color_sort_bin.cpp

#include <iostream>
#include <algorithm>
#include <fstream>
#include <iomanip>
#include <sstream>
#include <cstdlib>
using namespace std;

int main(int argc,char *argv[])
{

  streampos begin,end;
  //char * memblock;
  //int * memblock;
    int size;
    int number;

    int *array;

    if(argc!=3)
    {
        cout << "argument error" << endl;
    return 1;
  }

  //ifstream file ("example.bin", ios::in|ios::binary|ios::ate);
  //ifstream file (argv[1], ios::in|ios::binary|ios::ate);//ifstream:input file class
  ifstream file (argv[1], ios::in|ios::binary);

  //    ofstream: Stream class to write on files
  //  ifstream: Stream class to read from files
  //  fstream: Stream class to both read and write from/to files.

    number=atoi(argv[2]);


  if (file.is_open())
  {

    begin = file.tellg(); //size = file size, tellg-Get position in input sequence

        file.seekg(0,ios::end);

        end = file.tellg();

        size = end - begin;

        cout << "size=" << size <<endl;

    //memblock = new char [size];
    //memblock = new char [size];

        //cout << "memblock=" << memblock <<endl;

    //file.seekg (0, ios::beg); //ios::beg-offset counted from the beginning of the stream
                                                            //Set position in input sequence
    //file.read (memblock, size);//read block of data

        int pos=file.tellg();

        array = new int[size];

        file.seekg(0,ios::beg);

        file.read((char *)array,size);

    sort(array, array + number);

    for (int i = 0; i < number; ++i)
        {
            cout << array[i] << endl;
        }


    file.close();

    cout << "the entire file content is in memory\n";

    delete[] array;
    }

    else cout << "Unable to open file";

    return 0;

}