Compilare: user.cpp: In function ‘int main()’: user.cpp:17:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghi2.in", "r", stdin); ^ user.cpp:18:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghi2.out", "w", stdout); ^ user.cpp:20:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:26:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:28:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf", &x, &y); ^ user.cpp:46:46: warning: ‘max_y’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%.3lf\n", (max_x - min_x) * (max_y - min_y)); ^ user.cpp:46:28: warning: ‘max_x’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%.3lf\n", (max_x - min_x) * (max_y - min_y)); ^ user.cpp:46:46: warning: ‘min_y’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%.3lf\n", (max_x - min_x) * (max_y - min_y)); ^ user.cpp:46:28: warning: ‘min_x’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%.3lf\n", (max_x - min_x) * (max_y - min_y)); ^