#include <stdio.h>
#include <stdlib.h>
#include <iostream.h>
#include <fstream.h>
ofstream fout;
           // see man fstream
FILE * fff; // C FILE pointer
int main()
{   char temps[99];
   fout.open("myout.dat", ios::out);
   fout << "Hello there" << endl;
   fout << "Line2" << endl;
   fout << "Line 3\n" << "line 4" << endl;
   fout.close();
   cout << "=== === ===\n";
   system("cat -n myout.dat");
   cout << "=== === ===\n";
   cout << "===== ===== =====" << endl;
   fff = fopen("myout.dat","rt");
   // how to check if fopen ok?
   while(! feof(fff) ){
      fgets(temps, 88, fff);
      cout << temps << endl;
   }
   cout << "===== ===== =====" << endl;
   fclose(fff);
}