Compilare: user.cpp: In function ‘int main()’: user.cpp:28:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arie.in", "r", stdin); ^ user.cpp:29:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arie.out", "w", stdout); ^ user.cpp:33:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:38:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ user.cpp: In member function ‘void POINT::read()’: user.cpp:12:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf", &x, &y); ^ user.cpp: In function ‘int main()’: user.cpp:92:9: warning: ‘b2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(b1 > b2) ^ user.cpp:92:9: warning: ‘b1’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:67:9: warning: ‘a2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(a1 > a2) ^ user.cpp:67:9: warning: ‘a1’ may be used uninitialized in this function [-Wmaybe-uninitialized]