Compilare: user.cpp: In function ‘int main()’: user.cpp:32:60: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(++N; i < j; ++i) word[N][ ++word[N][0] ] = s[i]; ^ user.cpp:39:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] y[i] = word[i][ word[i][0] ]; ^ user.cpp:44:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] best[i] = 1+best[ ultim[ y[i] ] ]; ^ user.cpp:45:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] fiu[i] = ultim[ y[i] ]; ^ user.cpp:47:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( best[i] > best[ ultim[ x[i] ] ] ) ultim[ x[i] ] = i; ^ user.cpp:47:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( best[i] > best[ ultim[ x[i] ] ] ) ultim[ x[i] ] = i; ^ user.cpp:17:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text3.in","r",stdin); ^ user.cpp:18:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text3.out","w",stdout); ^ user.cpp:55:36: warning: ‘idx’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i = 1; i <= word[idx][0]; ++i) printf("%c",word[idx][i]); ^