Compilare: user.cpp: In function ‘int main()’: user.cpp:81:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.in","r",stdin); ^ user.cpp:82:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.out","w",stdout); ^ user.cpp: In function ‘void READ_DATA(int (*)[1100], int&)’: user.cpp:33:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:36:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&A[i][j]); ^ user.cpp: In function ‘int main()’: user.cpp:72:34: warning: ‘cmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(D[lmax+dx[i]][cmax+dy[i]]==MAX) ^ user.cpp:56:20: note: ‘cmax’ was declared here int MAX=0,lmax,cmax; ^ user.cpp:72:22: warning: ‘lmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(D[lmax+dx[i]][cmax+dy[i]]==MAX) ^ user.cpp:56:15: note: ‘lmax’ was declared here int MAX=0,lmax,cmax; ^