Compilare: user.cpp: In function ‘int main()’: user.cpp:88:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spider.in", "r", stdin); ^ user.cpp:89:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spider.out", "w", stdout); ^ user.cpp:93:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:95:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j = 1; j <= M; j++) scanf("%d", &A[i][j]); ^ user.cpp:130:25: warning: ‘coloana’ may be used uninitialized in this function [-Wmaybe-uninitialized] drum(linie, coloana); ^ user.cpp:130:25: warning: ‘linie’ may be used uninitialized in this function [-Wmaybe-uninitialized]