/in/foo.c: In function 'main':
/in/foo.c:11:17: error: expected expression before 'int'
   11 |                 int j=1;
      |                 ^~~
/in/foo.c:12:16: error: 'j' undeclared (first use in this function)
   12 |         switch(j)
      |                ^
/in/foo.c:12:16: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:19:9: error: case label not within a switch statement
   19 |         case 2:
      |         ^~~~