/in/foo.c: In function 'main':
/in/foo.c:21:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int *' [-Wformat=]
   21 |                 printf("%d ",&b[j][i]);
      |                         ~^   ~~~~~~~~
      |                          |   |
      |                          int int *
      |                         %ls