/in/foo.cc: In function 'int main()':
/in/foo.cc:14:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<line.length();i++)
          ~^~~~~~~~~~~~~~
/in/foo.cc:26:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(i==line.length()-1)
      ~^~~~~~~~~~~~~~~~~
/in/foo.cc:11:8: warning: variable 'j' set but not used [-Wunused-but-set-variable]
  int i,j=0;
        ^