#include <iostream>
#include <fstream>

using namespace std;

int main(int argc, char* argv[])
{
    ifstream in(argv[1]);
    in.seekg(0, ios::end); // End of file
    streampos sp = in.tellg(); // Size of file
    cout << "file size = " << sp << endl;
    in.seekg(-sp/10, ios::end);
    streampos sp2 = in.tellg();
    in.seekg(0, ios::beg); // Start of file
    cout << in.rdbuf(); // Print whole file
    in.seekg(sp2); // Move to streampos
    // Prints the last 1/10th of the file:
    cout << endl << endl << in.rdbuf() << endl;
    return 0;
}