Ficheiro de texto

// apple xcode
// paulogp
#include <iostream>
#include <fstream>
#include <string>

#include <cstdlib>
#include <ctime>
#include <fstream>

using namespace std;

int main (int argc, const char * argv[])
{
    // input
    ifstream the_input_stream ("infile.txt");
    string the_first, the_last;

    if (the_input_stream.is_open())
    {
        while (the_input_stream)
        {
            the_input_stream >> the_first >> the_last;
            cout << the_last << ", " << the_first << endl;
        }
    }

    the_input_stream.close();

    // output
    int the_rand;

    srand ((unsigned)time (0)); // positive rand

    ofstream the_output_stream ("outputfile.txt", ios::trunc); // ios::trunc to NOT append file

    for (int i = 0; i < 1000000; i++)
    {
        the_rand = (rand() % 100) + 1; // random [1, 100]
        the_output_stream << the_rand << endl;
    }

    the_output_stream.close();

    // how may even number are inside the file
    int the_temp;
    int the_even = 0;

    the_input_stream.open ("outputfile.txt");

    while (the_input_stream)
    {
        the_input_stream >> the_temp;
        if ((the_temp % 2) == 0)
        {
            the_even ++;
        }
    }

    the_input_stream.close();

    cout << "pares: " << the_even << endl;
    cout << "done" << endl;

    return 0;
}