Compilare: user.cpp: In function ‘void ReadInput()’: user.cpp:27:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:29:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &pts[i].x, &pts[i].y); ^ user.cpp: In function ‘void ProcessQueries()’: user.cpp:65:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int m; scanf("%d", &m); ^ user.cpp:67:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x1, y1, x2, y2; scanf("%d%d%d%d", &x1, &y1, &x2, &y2); ^