/in/foo.cc: In function 'int main()':
/in/foo.cc:26:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(i=0;i<currentdirectory.size();i++)
              ~^~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:39:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(i=0;i<currentdirectory.size();i++)
               ~^~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:55:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
              else if(directoryname.size()==x)
                      ~~~~~~~~~~~~~~~~~~~~^~~
/in/foo.cc:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
               for(i=0;i<currentdirectory.size();i++)
                       ~^~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:60:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                    for(j=i;j<currentdirectory.size();j++)
                            ~^~~~~~~~~~~~~~~~~~~~~~~~