Name of files

Using Arduino Storage
9

I'm back !
It's more a copy/paste of tutorial see on the web than my own code for the sprintf().
But the complilator looks happy. What do you thinks about it ?

  unsigned long taille_cph = 0 ,taille_cph_MAX = myFile.size();
   int Chaine_Tampon, cpt = 0 ;  // String of storage
   char name_a[] = "Svg_ph";
   char name_b[] = ".txt";
   char name[256];
   
    while(taille_cph <= taille_cph_MAX){
      myFile = SD.open("crea_cph.txt", FILE_READ); // open "creation_cph.txt"
      Chaine_Tampon = myFile.read(); 
      myFile.close(); // close "creation_cph.txt"  
   
      sprintf(name, "%s%s%d", name_a, name_b, cpt);  
    
      myFile = SD.open( name , FILE_WRITE);
      myFile.println(Chaine_Tampon,DEC);
      myFile.close();
      cpt++;
    }