Compilare: user.cpp: In function ‘int main()’: user.cpp:53:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] vizch[a[i + dx[p]][j + dy[p]]]++; ^ user.cpp:56:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(vizch[ch] >= 1) { ^ user.cpp:25:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in", "r", stdin); ^ user.cpp:26:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out", "w", stdout); ^ user.cpp:28:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n", &v, &n, &m); ^ user.cpp:70:47: warning: ‘bestch’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d\n%c\n", besti, bestj, bestch); ^