/in/foo.cc: In function 'int main()':
/in/foo.cc:7:14: error: 'geline' was not declared in this scope
  geline(cin,a);
              ^
/in/foo.cc:10:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<a.size();)
              ~^~~~~~~~~
/in/foo.cc:13:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=i;j<i+b.size();j++)
               ~^~~~~~~~~~~