Compilare: user.cpp: In function ‘std::string getString()’: user.cpp:71:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < in.size() && isspace(in[p])) ^ user.cpp:74:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p < in.size() && !isspace(in[p])) { ^ user.cpp: In function ‘int main()’: user.cpp:87:2: warning: ‘n’ is used uninitialized in this function [-Wuninitialized] for (int i = 1; i <= n; ++i) { ^