/in/foo.c: In function 'main':
/in/foo.c:21:9: error: expected expression before '{' token
  a[100]={0};
         ^
/in/foo.c:44:16: error: 'j' undeclared (first use in this function); did you mean 'jw'?
   printf("%d", j);
                ^
                jw
/in/foo.c:44:16: note: each undeclared identifier is reported only once for each function it appears in