// This program demonstrates the tellg function.
#include <iostream>
#include <fstream>
#include <cctype>               // For toupper
using namespace std;

int main()
{
    // Variables used to read the file.
    long offset;
    char ch;

    char response;              //User response

    // Create the file object and open the file.
    fstream file("letters.txt", ios::in);
    if (!file)
    {
        cout << "Error opening file.";
        return 0;
    }

    // Work with the file.
    do
    {
        // Where in the file am I?
        cout << "Currently at position " << file.tellg() << endl;

        // Get a file offset from the user.
        cout << "Enter an offset from the beginning of the file: ";
        cin >> offset;

        // Read the character at the given offset.
        file.seekg(offset, ios::beg);
        file.get(ch);
        cout << "Character read: " << ch << endl;
        cout << "Do it again? ";
        cin >> response;
    } while (toupper(response) == 'Y');

    file.close();
    return 0;
}