foo.c: In function 'main':
foo.c:9:23: error: expected expression before ']' token
    9 |         printf("%d",b[]a
      |                       ^
foo.c:11:10: error: expected ';' before '}' token
   11 | return 0;
      |          ^
      |          ;
   12 | }
      | ~         

[Hydro](https://hydro.ac)提供评测服务