fprintf(stdout, "Generate an SDF2D file from two input SDF2D files\n");
fprintf(stdout, "\n");
fprintf(stdout, " infile1 Name of first input SDF file\n");
fprintf(stdout, "Generate an SDF2D file from two input SDF2D files\n");
fprintf(stdout, "\n");
fprintf(stdout, " infile1 Name of first input SDF file\n");