Compilare: user.cpp: In member function ‘void HugeNumber::operator+=(const HugeNumber&)’: user.cpp:44:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= length || i <= rhs.length || t; ++i, t /= 10) ^ user.cpp:44:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= length || i <= rhs.length || t; ++i, t /= 10) ^ user.cpp:45:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] num[i] = (t += ((i <= length) ? (num[i]) : (0)) + ((i <= rhs.length) ? (rhs.num[i]) : (0))) % 10; ^ user.cpp:45:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] num[i] = (t += ((i <= length) ? (num[i]) : (0)) + ((i <= rhs.length) ? (rhs.num[i]) : (0))) % 10; ^