Compilare: user.cpp: In function ‘int main()’: user.cpp:60:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.in","r",stdin); ^ user.cpp:61:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.out","w",stdout); ^ user.cpp:62:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&X,&Y,&N,&P); ^ user.cpp:67:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&D); ^ user.cpp: In function ‘void Fill()’: user.cpp:43:27: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] Queue[1].x=i,Queue[1].y=j+1; ^