I wrote some piece of code which reads and write multiple data structures on a file using C++. I would be grateful to get your feedback on what you think about the code (it works at least when I tested). Thanks.

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <sstream>
using namespace std;

// data structure to be written to a file 
struct WebSites
{
    char SiteName[100];
    int Rank;
}s1,s2,s3,s4;


int _tmain(int argc, _TCHAR* argv[])
{
    strcpy(s1.SiteName, "www.ppp.com");
    s1.Rank = 0;

    strcpy(s2.SiteName, "www.rrr.com");
    s2.Rank = 111;

    strcpy(s3.SiteName, "www.code.com");
    s3.Rank = 123;

    strcpy(s4.SiteName, "www.yahoo.com");
    s4.Rank = 14;

    // write
    fstream binary_file("c:\\test.dat",ios::out|ios::binary|ios::app);
    binary_file.write(reinterpret_cast<char *>(&s1),sizeof(WebSites));
    binary_file.write(reinterpret_cast<char *>(&s2),sizeof(WebSites));
    binary_file.write(reinterpret_cast<char *>(&s3),sizeof(WebSites));
    binary_file.write(reinterpret_cast<char *>(&s4),sizeof(WebSites));
    binary_file.close();
    
    // Read data
    fstream binary_file2("c:\\test.dat",ios::binary|ios::in| ios::ate );
    int size = binary_file2.tellg();
    for(int i = 0; i<size/sizeof(WebSites); i++)
    { 
        WebSites p_Data;
        binary_file2.seekg(i*sizeof(WebSites));
        binary_file2.read(reinterpret_cast<char *>(&p_Data),sizeof(WebSites));

        cout<<p_Data.SiteName<<endl;
        cout<<"Rank: "<< p_Data.Rank<<endl;
    }
    binary_file2.close();

    return 0;
}