#include<stdio.h>

main(){
  FILE* fd;
  int i;
  char str[500];
  fd=popen("sort","w");
  fprintf(fd,"Prima linie de text\n");
  fprintf(fd,"A doua linie de text\n");  
  fprintf(fd,"A treia linie de text\n");
  fclose(fd);
  printf("\n");
}