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#include <fstream>
#include <iostream>
#include <string>

int main()
{
    std::ofstream outFile( "example.txt" );
    outFile << "Linia 1\n";
    outFile << "Linia 2\n";
    outFile << "Linia 3\n";
    outFile.close();

    std::fstream file( "example.txt", std::ios::in | std::ios::out );

    std::streampos readPos = file.tellg();
    std::cout << "Pozycja wksanzika odczytu (tellg): " << readPos << std::endl;

    file.seekg( 9, std::ios::beg );
    readPos = file.tellg();
    std::cout << "Nowa pozycja wskanzika odczytu (seekg): " << readPos << std::endl;

    std::string line;
    std::getline( file, line );
    std::cout << "Odczytana linia: " << line << std::endl;

    std::streampos writePos = file.tellp();
    std::cout << "Pozycja wskaznika zapisu (tellp): " << writePos << std::endl;

    file.seekp( 0, std::ios::end );
    writePos = file.tellp();
    std::cout << "Nowa pozycja zapisu (seekp): " << writePos << std::endl;

    file << "Linia 4\n";

    file.close();

    return 0;
}