/in/foo.c: In function 'main':
/in/foo.c:39:2: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  else if(month=10)
  ^~~~
/in/foo.c:43:7: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  else if(month==12)
       ^~
/in/foo.c:45:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
   return 0;
   ^~~~~~