/in/foo.c: In function 'main':
/in/foo.c:22:3: warning: array subscript is above array bounds [-Warray-bounds]
   printf("%d\n",b[3][2]);
   ^~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:22:18: warning: array subscript is above array bounds [-Warray-bounds]
   printf("%d\n",b[3][2]);
                 ~^~~