void readtxtfile_mat(const char *filename, CompRow_Mat_double &A) { Coord_Mat_double C; readtxtfile_mat(filename, C); A = C; return; }
void readtxtfile_mat(const char *filename, CompCol_Mat_double *A) { Coord_Mat_double C; readtxtfile_mat(filename, &C); *A = C; return; }