Compilare: user.cpp: In function ‘int main()’: user.cpp:9:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("bila.in","r",stdin); ^ user.cpp:10:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("bila.out","w",stdout) ; ^ user.cpp:12:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m) ; ^ user.cpp:16:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&mat[i][j]) ; ^ user.cpp:11:59: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n , m ,i ,j ,cnt = 0 ,maxx = 0 ,minnr ,p1 ,p2 ,x ,y ; ^ user.cpp:11:56: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n , m ,i ,j ,cnt = 0 ,maxx = 0 ,minnr ,p1 ,p2 ,x ,y ; ^ user.cpp:11:41: warning: ‘minnr’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n , m ,i ,j ,cnt = 0 ,maxx = 0 ,minnr ,p1 ,p2 ,x ,y ; ^