Compilare: user.cpp: In function ‘int v1()’: user.cpp:31:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vs.size();i++) ^ user.cpp: In function ‘int v2()’: user.cpp:57:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vs.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:88:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vs.size();i++) fout<<vs[i]<<" "; ^ user.cpp:93:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vs.size();i++) fout<<vs[i]<<" "; ^