Compilare: user.cpp: In function ‘bool cmp(point, point)’: user.cpp:26:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return A.y < B.y || A.y == B.y && A.x > B.x; ^ user.cpp: In function ‘void graham()’: user.cpp:64:11: warning: variable ‘aux’ set but not used [-Wunused-but-set-variable] double aux[NMAX]; ^ user.cpp: In function ‘void read()’: user.cpp:19:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:21:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf\n", &a[i].x, &a[i].y); ^ user.cpp: In function ‘int main()’: user.cpp:95:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.in", "r", stdin); ^ user.cpp:96:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.out", "w", stdout); ^