/in/foo.cc: In function 'int find(fanyi*, std::__cxx11::string)':
/in/foo.cc:18:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<=k[i].a.size();j++)
               ~^~~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:40:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(start!=s.size())
        ~~~~~^~~~~~~~~~
/in/foo.cc:45:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=start;i<=s.size()&&pd(s[i]);i++)
                   ~^~~~~~~~~~
/in/foo.cc:42:7: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int l;
       ^