#include <iostream>
#include <fstream>
#include <sstream>
#include <ctime>    
#include <unistd.h>



using namespace std;
void displayTime(int hours, int minutes, int seconds) {

   system("cls"); 

   cout << hours << ":"
        << minutes << ":"
        << seconds << endl;
}
int main()
{
  string filename;
  ofstream files;
  
  int hour = 0;
  int min = 0;
  int sec = 0;

  displayTime(hour, min, sec);

  while(true) {
    sleep(1);

    sec++;

    if(sec > 59) {
      min++;
      sec = 0;
        for (int i = 0; i < min; i++)
  {
    stringstream a;
    a << i;
    filename = "MD " + a.str();
    filename += ".txt";
    cout << filename << endl;
    files.open(filename.c_str(), ios::out);
        files << "Kommy"+a.str() +"\n";
        files << "Kommy"+a.str();
    files.close();

    
  }
    } 

    if(min > 59) {
      hour++;
      sec = 0;
      min = 0;
    }

    displayTime(hour, min, sec);
  }

    

}

Disallowed system call: SYS_fork