Compilare: user.cpp: In member function ‘int my_number::getSize()’: user.cpp:27:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < repr.size() && repr[i] == '0') ^ user.cpp: In member function ‘void my_number::add(std::string)’: user.cpp:35:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < num.size(); i++) ^ user.cpp: In member function ‘void my_number::sub(std::string)’: user.cpp:59:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < num.size(); i++) ^ user.cpp: In member function ‘void my_number::div(int)’: user.cpp:123:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int startr = 0; startr < repr.size() - 1; startr++) ^ user.cpp: In member function ‘void my_number::print()’: user.cpp:139:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < repr.size() && repr[i] == '0') ^ user.cpp:143:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == repr.size()) ^