Contiguous 2D Matrix C99

contiguous_2d_matrix.c

int main(int argc, char **argv) {
  size_t rows = atoi(argv[1]);
  size_t columns = atoi(argv[2]);

  /* This is really cool!!! */
  int (*matrix)[columns] = malloc(sizeof(*matrix) * rows);

  if (matrix) {
    matrix[0][0] = 13;
    matrix[1][0] = 1;

    for (size_t i = 0; i < rows; i++) {
      for (size_t j = 0; j < columns; j++) {
        printf("%d ", matrix[i][j]);
      }
      printf("\n");
    }
    free(matrix);
  }

  exit(0);
}