Compilare: user.cpp: In function ‘void potrivire()’: user.cpp:24:9: warning: unused variable ‘i’ [-Wunused-variable] int i,k=0; ^ user.cpp:24:11: warning: unused variable ‘k’ [-Wunused-variable] int i,k=0; ^ user.cpp: In function ‘int main()’: user.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) fout<<v[i]<<" "; ^