Compilare: user.cpp: In function ‘int main()’: user.cpp:38:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] ultim[ str[i] ] = i; ^ user.cpp:45:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( str[i]==words[j][ words[j][0] ] ) ^ user.cpp:48:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] u = pos[u][ words[j][z] ]; ^ 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("mesaj.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("mesaj.out","w",stdout); ^ user.cpp:22:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&N,&M); ^ user.cpp:23:34: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( str+1, LMax-1, stdin ); ^ user.cpp:27:42: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( words[i]+1, Len-1, stdin ); ^