Compilare: user.cpp: In member function ‘bool NUMBER::Mod2()’: user.cpp:23:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<C.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:71:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<N2.size();i++) ^ user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<N2[i].C.size();j++) cout<<N2[i].C[j]; ^ user.cpp:78:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<N10.size();i++) ^ user.cpp:80:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<N10[i].C.size();j++) cout<<N10[i].C[j]; ^ user.cpp:96:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<N2[i].C.size()) result=0; ^