printf("-D <value> \t diffusion rate from cryst to amorph cells (default %f)\n",DR_AC);
printf("-c <value> \t diffusion rate in cryst cells (default %f)\n",DR_CC);
printf("-e <value> \t do diffusion every <value> steps (default %d)\n",DIFF_RATE);
printf("-D <value> \t diffusion rate from cryst to amorph cells (default %f)\n",DR_AC);
printf("-c <value> \t diffusion rate in cryst cells (default %f)\n",DR_CC);
printf("-e <value> \t do diffusion every <value> steps (default %d)\n",DIFF_RATE);