/in/foo.c: In function 'findmax':
/in/foo.c:17:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (i=1;i<n;i++)
  ^~~
/in/foo.c:23:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   return j;
   ^~~~~~
/in/foo.c: In function 'main':
/in/foo.c:10:2: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf ("%d",m);
  ^~~~~~~~~~~~~~~
/in/foo.c: In function 'findmax':
/in/foo.c:23:10: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   return j;
          ^