Compilare: user.cpp: In function ‘int main()’: user.cpp:89:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.in", "r", stdin); ^ user.cpp:90:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.out", "w", stdout); ^ user.cpp:92:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:94:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf", &P[i].x, &P[i].y); ^ user.cpp:110:25: warning: ‘farRight’ may be used uninitialized in this function [-Wmaybe-uninitialized] int farUp, farLeft, farRight; ^ user.cpp:110:16: warning: ‘farLeft’ may be used uninitialized in this function [-Wmaybe-uninitialized] int farUp, farLeft, farRight; ^