/in/foo.cc: In function 'int main()':
/in/foo.cc:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<=strlen(s)-strlen(ss);++i)
                 ~^~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:15:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j=0;j<=strlen(ss)-1;++j)
                  ~^~~~~~~~~~~~~~
/in/foo.cc:22:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(j==strlen(ss)&&(s[j+i]==' '||j+i==strlen(s)))
            ~^~~~~~~~~~~~
/in/foo.cc:22:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(j==strlen(ss)&&(s[j+i]==' '||j+i==strlen(s)))
                                         ~~~^~~~~~~~~~~