Compilare: user.cpp: In function ‘int main()’: user.cpp:95:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();i++) ^ user.cpp: In function ‘digit GetDigit(int)’: user.cpp:30:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘bool operator>(digit, digit)’: user.cpp:54:15: warning: ‘c2’ may be used uninitialized in this function [-Wmaybe-uninitialized] return c1>c2; ^ user.cpp:54:15: warning: ‘c1’ may be used uninitialized in this function [-Wmaybe-uninitialized]