/in/foo.cc:41:23: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
              sscanf(c,"%"ll,&bt[++len]);
                       ^
/in/foo.cc:46:22: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
             sscanf(c,"%"ll,&bt[++len]);
                      ^
/in/foo.cc:51:16: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
         printf("%"ll,bt[len]);
                ^
/in/foo.cc:53:17: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
          printf("%09"ll,bt[i]);
                 ^
/in/foo.cc: In member function 'BIGNUM BIGNUM::operator=(LL)':
/in/foo.cc:34:78: warning: no return statement in function returning non-void [-Wreturn-type]
     BIGNUM operator = (LL x) {len = 1;memset(bt,0,sizeof bt);bt[1]=x;upbit();}
                                                                              ^
/in/foo.cc: In member function 'BIGNUM BIGNUM::mul(LL)':
/in/foo.cc:68:5: warning: no return statement in function returning non-void [-Wreturn-type]
     }
     ^