Compilare: user.cpp: In member function ‘int BigNr::get(int)’: user.cpp:41:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i >= v.size ()) ^ user.cpp: In member function ‘BigNr BigNr::operator*(BigNr)’: user.cpp:48:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size (); i++) ^ user.cpp:49:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0, t = 0; j < b.v.size () || t; j++, t /= 10) { ^ user.cpp:50:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i+j >= c.v.size ()) ^ user.cpp: In member function ‘BigNr BigNr::operator+(BigNr)’: user.cpp:67:29: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if (minus ^ b.minus == false) ^ user.cpp: In member function ‘BigNr BigNr::operator-(BigNr)’: user.cpp:82:29: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if (minus ^ b.minus == false) ^ user.cpp: In member function ‘BigNr BigNr::aduna(BigNr, bool)’: user.cpp:97:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, t = 0; i < v.size () || i < b.v.size () || t; i++, t /= 10) { ^ user.cpp:97:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, t = 0; i < v.size () || i < b.v.size () || t; i++, t /= 10) { ^ user.cpp:98:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i >= c.v.size ()) ^ user.cpp: In member function ‘BigNr BigNr::scade(BigNr, bool)’: user.cpp:111:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, t = 0; i < v.size () || i < b.v.size () || t; i++) { ^ user.cpp:111:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, t = 0; i < v.size () || i < b.v.size () || t; i++) { ^ user.cpp:112:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i >= c.v.size ()) ^