Compilare: user.cpp: In function ‘int main()’: user.cpp:44:5: warning: unused variable ‘fmin’ [-Wunused-variable] int fmin=A[1].x; int fmax=A[1].y; ^ user.cpp:44:22: warning: unused variable ‘fmax’ [-Wunused-variable] int fmin=A[1].x; int fmax=A[1].y; ^ user.cpp:37:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("reactivi.in", "r", stdin); ^ user.cpp:38:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("reactivi.out", "w", stdout); ^ user.cpp:40:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:42:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &A[i].x, &A[i].y); ^