Compilare: user.cpp: In function ‘int main()’: user.cpp:20:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void afisare()’: user.cpp:51:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mutualFriends.size();i++) ^ user.cpp:54:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i != mutualFriends.size()-1) ^ user.cpp:47:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void Process(int)’: user.cpp:75:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(actPoz <G[frI].size() && G[frI][actPoz] == i) ^ user.cpp: In function ‘void manageMutual(int, int)’: user.cpp:92:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<G[frI].size() && j<G[frJ].size()) ^ user.cpp:92:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<G[frI].size() && j<G[frJ].size()) ^