Eroare de compilare: user.cpp: In function ‘void write()’: user.cpp:12:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) ^ user.cpp: In function ‘void read()’: user.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:79:23: error: invalid initialization of non-const reference of type ‘std::vector<int>&’ from an rvalue of type ‘int’ qs(0, a.size() - 1); ^ user.cpp:56:6: error: in passing argument 1 of ‘void qs(std::vector<int>&, int, int)’ void qs(vector <int> &a, int left, int right) ^