Compilare: user.cpp: In function ‘long long int get_int()’: user.cpp:42:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!digit[x]) ^ user.cpp:53:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(digit[x]) ^ user.cpp: In function ‘void finise(int, int)’: user.cpp:172:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[act.nod].size(); i++) ^ user.cpp: In function ‘void deleteu(int, int)’: user.cpp:198:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[act.nod].size(); i++) ^ user.cpp:209:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[act.nod].size(); i++) ^ user.cpp: In function ‘char get_char()’: user.cpp:29:29: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(BUF,SBUF,1,in); ^