Compilare: user.cpp: In function ‘int rotund(int, int&)’: user.cpp:42:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<vec.size(); i++) ^ user.cpp:54:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int drept(int, int&)’: user.cpp:95:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:102:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()) ^ user.cpp:115:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()) ^ user.cpp:126:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()) ^ user.cpp:153:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<vec.size(); i++)sum+=vec[i]; ^