/in/foo.cc:42:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:58:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int j=0;j<strlen(dd);++j)
                  ~^~~~~~~~~~~