/in/foo.cc: In function 'void count(char*, int&)':
/in/foo.cc:7:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<strlen(s);i++)
              ~^~~~~~~~~~
/in/foo.cc:10:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(kk==strlen(s))
     ~~^~~~~~~~~~~
/in/foo.cc:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<strlen(s);i++)
              ~^~~~~~~~~~
/in/foo.cc:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=i+1;j<strlen(s);j++)
                  ~^~~~~~~~~~