Compilare: user.cpp: In function ‘int rotund(int, int&)’: user.cpp:41:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<vec.size(); i++) ^ user.cpp:53:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int drept(int, int&)’: user.cpp:94:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:101:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()) ^ user.cpp:114:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()) ^ user.cpp:125:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()) ^ user.cpp:151:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<vec.size(); i++)sum+=vec[i]; ^