// This program reads a number from a file.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main()
{
    string filename = "some_numbers.txt";
    int num1;

    ifstream infile;         // instantiate file pointer object
    infile.open(filename);   // associate file with file pointer object

    if (!infile)
    {
        cout << "Error opening file." << endl;
        return 1;  // exit program with error code
    }
    
    cout << "Reading from file ... ";

    infile >> num1;
    infile.close();    // close the file!

    cout << "Done!" << endl;
    cout << "The first number in the file is " << num1 << "." << endl;

    return 0;
}