Compilare: main.cpp: In member function 'void number::add(int)': main.cpp:17:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i=0;i<v.size() and carry;++i) | ~^~~~~~~~~ main.cpp: In member function 'void number::prod(int)': main.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i=0;i<v.size();++i) | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i=0;i<cmd.size();) | ~^~~~~~~~~~~ main.cpp:87:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for(int i=0;i<cmd.size();) | ~^~~~~~~~~~~