/in/foo.cc: In member function 'M M::operator+(const M&)':
/in/foo.cc:80:27: warning: iteration 99 invokes undefined behavior [-Waggressive-loop-optimizations]
         ans.number[i + 1] = ans.number[i] / this->base;
         ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:77:32: note: within this loop
     for (unsigned int i = 0; i < 100 ; i++) {
                              ~~^~~~~