Compilare: main.cpp: In member function 'bigint bigint::operator+(bigint)': main.cpp:25:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (; i < other.number.size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:30:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while (rmbr && i < this->number.size()) { | ~~^~~~~~~~~~~~~~~~~~~~~