Compilare: user.cpp: In function ‘bool cmp1(vizita, vizita)’: user.cpp:18:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] else return a.red = b.red; ^ user.cpp: In function ‘bool cmp2(vizita, vizita)’: user.cpp:27:27: warning: suggest parentheses around assignment used as truth value [-Wparentheses] else return a.red = b.red; ^ user.cpp: In function ‘int main()’: user.cpp:56:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dlboss.in", "r", stdin); ^ user.cpp:57:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dlboss.out", "w", stdout); ^ user.cpp:60:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &t); ^ user.cpp:63:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^