#include <fstream> //for file streams
#include <iostream>
using namespace std;
const int MAX = 100; //size of buffer
int buff[MAX]; //buffer for integers
main()
{
    int j;  
    for(j=0; j<MAX; j++) //fill buffer with data
          buff[j] = j; 
    //create output stream
    ofstream os("edata.dat", ios::binary);
    //write to it
    os.write( reinterpret_cast<char*>(buff), MAX*sizeof(int) );
    os.close(); //must close it
    
    for(j=0; j<MAX; j++) //erase buffer
        buff[j] = 0;
    //create input stream
    ifstream is("edata.dat", ios::binary);
    //read from it
    is.read( reinterpret_cast<char*>(buff), MAX*sizeof(int) );
    
    for(j=0; j<MAX; j++) //check data
    {
       if( buff[j] != j )
       { cerr << "Data is incorrect\n"; exit(1); }
    }
    cout << "Data is correct\n";
    system("pause");
}