Eroare de compilare: user.cpp: In function ‘void mult(BigInt (*)[3], const BigInt (*)[3])’: user.cpp:120: error: no match for ‘operator+’ in ‘aux[i][j] + BigInt::operator*(const BigInt&)(((const BigInt&)(&(*(b + ((unsigned int)(((unsigned int)k) * 48u))))[j])))’ user.cpp:72: note: candidates are: BigInt BigInt::operator+(BigInt&) /usr/include/c++/4.4/bits/stl_bvector.h:264: note: std::_Bit_iterator std::operator+(ptrdiff_t, const std::_Bit_iterator&) /usr/include/c++/4.4/bits/stl_bvector.h:350: note: std::_Bit_const_iterator std::operator+(ptrdiff_t, const std::_Bit_const_iterator&) user.cpp: In function ‘int main()’: user.cpp:154: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:155: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:157: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result