Compilare: user.cpp: In static member function ‘static Spectacol Spectacol::from(Cerc)’: user.cpp:29:10: warning: unused variable ‘x’ [-Wunused-variable] double x = sqrt(c.x * c.x + c.y * c.y); ^ user.cpp: In function ‘int greedy(std::vector<Spectacol>)’: user.cpp:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < s.size(); i++) { ^ user.cpp: In function ‘void rezolvare()’: user.cpp:95:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < spectacole.size(); i++) { ^ user.cpp: In function ‘void citire()’: user.cpp:46:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &n); ^ user.cpp:48:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d ", &c[i].x, &c[i].y, &c[i].r); ^ user.cpp: In function ‘int main()’: user.cpp:110:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.in", "r", stdin); ^ user.cpp:111:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.out", "w", stdout); ^