Bsp.: Zufallsmuster

#include <iostream.h>
#include <iomanip.h>
#include <fstream.h>

extern "C" 
{
  #include <time.h>
  #include <stdlib.h>
}

void main()
{
  char buf[81];
  ofstream out;
  
  srandom(time(NULL));
  buf[80] = '\0';
  
  out.open("test.dat", ios::out);
  if (!out)
  {
    cerr << ": Can't write to file" << endl;
    exit(1);
  }
  for (int i=0; i<23; i++)
  {
    for (int j=0; j<80; j++)
    {
      if (random() % 6 > 3)
        buf[j] = '#';
      else
        buf[j] = ' ';
    }
    out << buf << '\n';
    // out << buf << endl;
  }
  out << flush;
  out.close();
}